Database Content Structure In GIS Environment

Table 2.1. List of construction standards

TT

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• Solutions for tourism development in Tien Lang - 10 zt2i3t4l5ee zt2a3gstourism, tourism development zt2a3ge zc2o3n4t5e6n7ts - District People's Committees and authorities of communes with tourist attractions should support, promote, and provide necessary information to people, helping them improve their knowledge about tourism. Raise tourism awareness for local people. * * * Due to limited knowledge and research time, the thesis inevitably has shortcomings. Therefore, I look forward to receiving guidance from teachers, experts as well as your comments to make the thesis more complete. Chapter III Conclusion Through the issues presented in Chapter II, we can come to some conclusions: Based on the strengths of available tourism resources, the types of tourism in Tien Lang that need to be promoted in the coming time are sightseeing and resort tourism, discovery tourism, weekend tourism. To improve the quality and diversify tourism products, Tien Lang district needs to combine with local cultural tourism resources, at the same time combine with surrounding areas, build rich tourism products. The strengths of Tien Lang tourism are eco-tourism and cultural tourism, so developing Tien Lang tourism must always go hand in hand with restoring and preserving types of cultural tourism resources. Some necessary measures to support and improve the efficiency of exploiting tourism resources in Tien Lang are: strengthening the construction of technical facilities and labor force serving tourism, actively promoting and advertising tourism, and expanding forms of capital mobilization for tourism development. CONCLUDE I Conclusion 1. Based on the results achieved within the framework of the thesis's needs, some basic conclusions can be drawn as follows: Tien Lang is a locality with great potential for tourism development. The relatively abundant cultural tourism resources and ecological tourism resources have great appeal to tourists. Based on this potential, Tien Lang can build a unique tourism industry that is competitive enough with other localities within Hai Phong city and neighboring areas. In recent years, the exploitation of the advantages of resources to develop tourism and build tourist routes in Tien Lang has not been commensurate with the available potential. In terms of quantity, many resource objects have not been brought into the purpose of tourism development. In terms of time, the regular service time has not been extended to attract more visitors. Infrastructure and technical facilities are still weak. The labor force is still thin and weak in terms of expertise. Tourism programs and routes have not been organized properly, the exploitation content is still monotonous, so it has not attracted many visitors. Although resources have not been mobilized much for tourism development, they are facing the risk of destruction and degradation. 2. Based on the results of investigation, analysis, synthesis, evaluation and selective absorption of research results of related topics, the thesis has proposed a number of necessary solutions to improve the efficiency of exploiting tourism resources in Tien Lang such as: promoting the restoration and conservation of tourism resources, focusing on investment and key exploitation of ecotourism resources, strengthening the construction of infrastructure and tourism workforce. Expanding forms of capital mobilization. In addition, the thesis has built a number of tourist routes of Hai Phong in which Tien Lang tourism resources play an important role. Exploiting Tien Lang tourism resources for tourism development is currently facing many difficulties. The above measures, if applied synchronously, will likely bring new prospects for the local tourism industry, contributing to making Tien Lang tourism an important economic sector in the district's economic structure. REFERENCES 1. Nhuan Ha, Trinh Minh Hien, Tran Phuong, Hai Phong - Historical and cultural relics, Hai Phong Publishing House, 1993 2. Hai Phong City History Council, Hai Phong Gazetteer, Hai Phong Publishing House, 1990. 3. Hai Phong City History Council, History of Tien Lang District Party Committee, Hai Phong Publishing House, 1990. 4. Hai Phong City History Council, University of Social Sciences and Humanities, VNU, Hai Phong Place Names Encyclopedia, Hai Phong Publishing House. 2001. 5. Law on Cultural Heritage and documents guiding its implementation, National Political Publishing House, Hanoi, 2003. 6. Tran Duc Thanh, Lecture on Tourism Geography, Faculty of Tourism, University of Social Sciences and Humanities, VNU, 2006 7. Hai Phong Center for Social Sciences and Humanities, Some typical cultural heritages of Hai Phong, Hai Phong Publishing House, 2001 8. Nguyen Ngoc Thao (editor-in-chief, Tourism Geography, Hai Phong Publishing House, two volumes (2001-2002) 9. Nguyen Minh Tue and group of authors, Hai Phong Tourism Geography, Ho Chi Minh City Publishing House, 1997. 10. Nguyen Thanh Son, Hai Phong Tourism Territory Organization, Associate Doctoral Thesis in Geological Geography, Hanoi, 1996. 11. Decision No. 2033/QD – UB on detailed planning of Tien Lang town, Hai Phong city until 2020. 12. Department of Culture, Information, Hai Phong Museum, Hai Phong relics - National ranked scenic spot, Hai Phong Publishing House, 2005. 13. Tien Lang District People's Committee, Economic Development Planning - Culture - Society of Tien Lang district to 2010. 14.Website www.HaiPhong.gov.vn APPENDIX 1 List of national ranked monuments STT Name of the monument Number, year of decisiondetermine Location 1 Gam Temple 938 VH/QĐ04/08/1992 Cam Khe Village- Toan Thang commune 2 Doc Hau Temple 9381 VH/QĐ04/08/1992 Doc Hau Village –Toan Thang commune 3 Cuu Doi Communal House 3207 VH/QĐDecember 30, 1991 Zone II of townTien Lang 4 Ha Dai Temple 938 VH/QĐ04/08/1992 Ha Dai Village –Tien Thanh commune APPENDIX II STT Name of the monument Number, year of decision Location 1 Phu Ke Pagoda Temple 178/QD-UBJanuary 28, 2005 Zone 1 - townTien Lang 2 Trung Lang Temple 178/QD-UBJanuary 28, 2005 Zone 4 – townTien Lang 3 Bao Khanh Pagoda 1900/QD-UBAugust 24, 2006 Nam Tu Village -Kien Thiet commune 4 Bach Da Pagoda 1792/QD-UB11/11/2002 Hung Thang Commune 5 Ngoc Dong Temple 177/QD-UBNovember 27, 2005 Tien Thanh Commune 6 Tomb of Minister TSNhu Van Lan 2848/QD-UBSeptember 19, 2003 Nam Tu Village -Kien Thiet commune 7 Canh Son Stone Temple 2160/QD-UBSeptember 19, 2003 Van Doi Commune –Doan Lap 8 Meiji Temple 2259/QD-UBSeptember 19, 2002 Toan Thang Commune 9 Tien Doi Noi Temple 477/QD-UBSeptember 19, 2005 Doan Lap Commune 10 Tu Doi Temple 177/QD-UBJanuary 28, 2005 Doan Lap Commune 11 Duyen Lao Temple 177/QD-UBJanuary 28, 2005 Tien Minh Commune 12 Dinh Xuan Uc Pagoda 177/QD-UBJanuary 28, 2005 Bac Hung Commune 13 Chu Khe Pagoda 177/QD-UBJanuary 28, 2005 Hung Thang Commune 14 Dong Dinh 2848/QD-UBNovember 21, 2002 Vinh Quang Commune 15 President's Memorial HouseTon Duc Thang 177/QD-UBJanuary 28, 2005 NT Quy Cao Ha Dai Temple Ben Vua Temple Tien Lang hot spring div.maincontent .p { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; margin:0pt; } div.maincontent p { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; margin:0pt; } div.maincontent .s1 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; font-size: 16pt; } div.maincontent .s2 { color: black; font-family:"Times New Roman", serif; font-style: italic; font-weight: bold; text-decoration: none; font-size: 14pt; } div.maincontent .s3 { color: black; font-family:"Times New Roman", serif; font-style: italic; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s4 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; font-size: 14pt; } div.maincontent .s5 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: bold; font-size: 14pt; } div.maincontent .s6 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s7 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: bold; text-decoration: none; font-size: 14pt; } div.maincontent .s8 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 9pt; vertical-align: 6pt; } div.maincontent .s9 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: bold; text-decoration: none; font-size: 12pt; } div.maincontent .s11 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; tex
• Identify Rating Levels and Rating Scales zt2i3t4l5ee zt2a3gstourism,quan lan,quang ninh,ecology,ecotourism,minh chau,van don,geography,geographical basis,tourism development,science zt2a3ge zc2o3n4t5e6n7ts of the islanders. Therefore, this indicator will be divided into two sub-indicators: a1. Natural tourism attractiveness a2. Cultural tourism attractiveness b. Tourist capacity The two island communes in Quan Lan have different capacities to receive tourists. Minh Chau Commune is home to many standard hotels and resorts, attracting high-income domestic and international tourists. Meanwhile, Quan Lan Commune has many motels mainly built and operated by local people, so the scale and quality are not high, and will be suitable for ordinary tourists such as students. c. Time of exploitation of Quan Lan Island Commune: Quan Lan tourism is seasonal due to weather and climate conditions and festivals only take place on certain days of the year, specifically in spring. In Quan Lan commune, the period from April to June and from September to November is considered the best time to visit Quan Lan because the cultural tourism activities are mainly associated with festivals taking place during this time. Minh Chau island commune: Tourism exploitation time is all year round, because this is a place with a number of tourist attractions with diverse ecosystems such as Bai Tu Long National Park Research Center, Tram forest, Turtle Laying Beach, so besides coming to the beach for tourism and vacation in the summer, Minh Chau will attract research groups to come for tourism combined with research at other times of the year. d. Sustainability The sustainability of ecotourism sites in Quan Lan and Minh Chau communes depends on the sensitivity of the ecosystems to climate changes. landscape. In general, these tourist destinations have a fairly high level of sustainability, because they are natural ecosystems, planned and protected. However, if a large number of tourists gather at certain times, it can exceed the carrying capacity and affect the sustainability of the environment (polluted beaches, damaged trees, animals moving away from their habitats, etc.), then the sustainability of the above ecosystems (natural ecosystems, human ecosystems) will also be affected and become less sustainable. e. Location and accessibility Both island communes have ports to take tourists to visit from Van Don wharf: - Quan Lan – Van Don traffic route: Phuc Thinh – Viet Anh high-speed boat and Quang Minh high-speed boat, depart at 8am and 2pm from Van Don to Quan Lan, and at 7am and 1pm from Quan Lan to Van Don. There are also wooden boats departing at 7am and 1pm. - Van Don - Minh Chau traffic route: Chung Huong high-speed train, Minh Chau train, morning 7:30 and afternoon 13:30 from Van Don to Minh Chau, morning 6:30 and afternoon 13:00 from Minh Chau to Van Don. f. Infrastructure Despite receiving investment attention, the issue of infrastructure and technical facilities for tourism on Quan Lan Island is still an issue that needs to be resolved because it has a direct impact on the implementation of ecotourism activities. The minimum conditions for serving tourists such as accommodation, electricity, water, communication, especially medical services, and security work need to be given top priority. Ecotourism spots in Minh Chau commune are assessed to have better infrastructure and technical facilities for tourism because there are quite complete and synchronous conditions for serving tourists, meeting many needs of domestic and foreign tourists. 3.2.1.4. Determine assessment levels and assessment scales Corresponding to the levels of each criterion, the index is the score of those levels in the order of 4, 3, 2, 1 decreasing according to the standard of each level: very attractive (4), attractive (3), average (2), less attractive (1). 3.2.1.5. Determining the coefficients of the criteria For the assessment of DLST in the two communes of Quan Lan and Minh Chau islands, the students added evaluation coefficients to show the importance of the criteria and indicators as follows: Coefficient 3 with criteria: Attractiveness, Exploitation time. These are the 2 most important criteria for attracting tourists to tourism in general and eco-tourism in particular, so they have the highest coefficient. Coefficient 2 with criteria: Capacity, Infrastructure, Location and accessibility . Because the assessment area is an island commune of Van Don district, the above criteria are selected by the author with appropriate coefficients at the average level. Coefficient 1 with criteria: Sustainability. Quan Lan has natural and human-made ecotourism sites, with high biodiversity and little impact from local human factors. Most of the ecotourism sites are still wild, so they are highly sustainable. 3.2.1.6. Results of DLST assessment on Quan Lan island a. Assessment of the potential for natural tourism development  For Minh Chau commune: + Natural tourism attractiveness is determined to be very attractive (4 points) and the most important coefficient (coefficient 3), so the score of the Attractiveness criterion is 4 x 3 = 12. + Capacity is determined as average (2 points) and the coefficient is quite important (coefficient 2), then the score of Capacity criterion is 2 x 2 = 4. + Exploitation time is long (4 points), the most important coefficient (coefficient 3) so the score of the Exploitation time criterion is 4 x 3 = 12. + Sustainability is determined as sustainable (4 points), the important coefficient is the average coefficient (coefficient 1), so the score of the Sustainability criterion is 4 x 1 = 4 points + Location and accessibility are determined to be quite favorable (2 points), the coefficient is quite important (coefficient 2), the criterion score is 2 x 2 = 4 points. + Infrastructure is assessed as good (3 points), the coefficient is quite important (coefficient 2), then the score of the Infrastructure criterion is 3 x 2 = 6 points. The total score for evaluating DLST in Minh Chau commune according to 6 evaluation criteria is determined as: 12 + 4 + 12 + 4 + 4 + 6 = 42 points Similar assessment for Quan Lan commune, we have the following table: Table 3.3: Assessment of the potential for natural ecotourism development in Quan Lan and Minh Chau communes Attractiveness of self-tourismof course Capacity Mining time Sustainability Location and accessibility Infrastructure Result Point DarkMulti Point DarkMulti Point DarkMulti Point DarkMulti Point DarkMulti Point DarkMulti CommuneMinh Chau 12 12 4 8 12 12 4 4 4 8 6 8 42/52 Quan CommuneLan 6 12 6 8 9 12 4 4 4 8 4 8 33/52 b. Assessment of the potential for humanistic tourism development  For Quan Lan commune: + The attractiveness of human tourism is determined to be very attractive (4 points) and the most important coefficient (coefficient 3), so the score of the Attractiveness criterion is 4 x 3 = 12. + Capacity is determined to be large (3 points) and the coefficient is quite important (coefficient 2), then the score of the Capacity criterion is 3 x 2 = 6. + Mining time is average (3 points), the most important coefficient (coefficient 3) so the score of the Mining time criterion is 3 x 3 = 9. + Sustainability is determined as sustainable (4 points), the important coefficient is the average coefficient (coefficient 1), so the score of the Sustainability criterion is 4 x 1 = 4 points. + Location and accessibility are determined to be quite favorable (2 points), the coefficient is quite important (coefficient 2), the criterion score is 2 x 2 = 4 points. + Infrastructure is rated as average (2 points), the coefficient is quite important (coefficient 2), then the score of the Infrastructure criterion is 2 x 2 = 4 points. The total score for evaluating DLST in Quan Lan commune according to 6 evaluation criteria is determined as: 12 + 6 + 6 + 4 + 4 + 4 = 36 points. Similar assessment with Minh Chau commune we have the following table: Table 3.4: Assessment of the potential for developing humanistic eco-tourism in Quan Lan and Minh Chau communes Attractiveness of human tourismliterature Capacity Mining time Sustainability Location and accessibility Infrastructure Result Point DarkMulti Point DarkMulti Point DarkMulti Point DarkMulti Point DarkMulti Point DarkMulti Quan CommuneLan 12 12 6 8 9 12 4 4 4 8 4 8 39/52 Minh CommuneChau 6 12 4 8 12 12 4 4 4 8 6 8 36/52 Basically, both Minh Chau and Quan Lan localities have quite favorable conditions for developing ecotourism. However, Quan Lan commune has more advantages to develop ecotourism in a humanistic direction, because this is an area with many famous historical relics such as Quan Lan Communal House, Quan Lan Pagoda, Temple worshiping the hero Tran Khanh Du, ... along with local festivals held annually such as the wind praying ceremony (March 15), Quan Lan festival (June 10-19); due to its location near the port and long exploitation time, the beaches in Quan Lan commune (especially Quan Lan beach) are no longer hygienic and clean to ensure the needs of tourists coming to relax and swim; this is also an area with many beautiful landscapes such as Got Beo wind pass, Ong Phong head, Voi Voi cave, but the ability to access these places is still very limited (dirt hill road, lots of gravel and rocks), especially during rainy and windy times; In addition, other natural resources such as mangrove forests and sea worms have not been really exploited for tourism purposes and ecotourism development. On the contrary, Minh Chau commune has more advantages in developing ecotourism in the direction of natural tourism, this is an area with diverse ecosystems such as at Rua De Beach, Bai Tu Long National Park Conservation Center...; Minh Chau beach is highly appreciated for its natural beauty and cleanliness, ranked in the top ten most beautiful beaches in Vietnam; Minh Chau commune is also home to Tram forest with a large area and a purity of up to 90%, suitable for building bridges through the forest (a very effective type of natural ecotourism currently applied by many countries) for tourists to sightsee, as well as for the purpose of studying and researching. Figure 3.1: Thenmala Forest Bridge (India) Source: https://www.thenmalaecotourism.com/(August 21, 2019) 3.2.2. Using SWOT matrix to evaluate Quan Lan island tourism General assessment of current tourism activities of Quan Lan island is shown through the following SWOT matrix: Table 3.5: SWOT matrix evaluating tourism activities on Quan Lan island Internal agent Strengths- There is a lot of potential for tourism development, especially natural ecotourism and humanistic ecotourism.- The unskilled labor force is relatively abundant.- resource environmentunpolluted, still Weaknesses- Poorly developed infrastructure, especially traffic routes to tourist destinations on the island.- The team of professional staff is still weak.- Tourism products in general quite wild, originalintact general and DLST in particularalone is monotonous. External agents Opportunity- Tourism is a key industry in the socio-economic development strategy of the province and Van Don economic zone.- Quan Lan was selected as a pilot area for eco-tourism development within the framework of the green growth project between Quang Ninh province and the Japanese organization JICA.- The flow of tourists and especially ecotourism in the world tends toincreasing Challenge- Weather and climate change abnormally.- Competition in tourism products is increasingly fierce, especially with other localities in the province such as Ha Long, Mong Cai...- Awareness of tourists, especially domestic tourists, about ecotourism and nature conservation is not high. Through summary analysis using SWOT matrix we see that:  To exploit strengths and take advantage of opportunities, it is necessary to: - Diversify products and service types (build more tourism routes aimed at specific needs of tourists: experiential tourism immersed in nature, spiritual cultural tourism...) - Effective exploitation of resources and differentiated products (natural resources and human resources) div.maincontent .p { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; margin:0pt; } div.maincontent p { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; margin:0pt; } div.maincontent .s1 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 13pt; } div.maincontent .s2 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 13pt; } div.maincontent .s3 { color: #0D0D0D; font-family:"Times New Roman", serif; font-style: normal; font-weight: bold; text-decoration: none; font-size: 14pt; } div.maincontent .s4 { color: black; font-family:"Times New Roman", serif; font-style: italic; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s5 { color: black; font-family:"Times New Roman", serif; font-style: italic; font-weight: bold; text-decoration: none; font-size: 14pt; } div.maincontent .s6 { color: black; font-family:"Times New Roman", serif; font-style: italic; font-weight: normal; text-decoration: none; font-size: 14pt; vertical-align: -3pt; } div.maincontent .s7 { color: black; font-family:"Times New Roman", serif; font-style: italic; font-weight: normal; text-decoration: none; font-size: 14pt; vertical-align: -2pt; } div.maincontent .s8 { color: black; font-family:"Times New Roman", serif; font-style: italic; font-weight: normal; text-decoration: none; font-size: 14pt; vertical-align: -1pt; } div.maincontent .s9 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s10 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: bold; text-decoration: none; font-size: 14pt; } div.maincontent .s11 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s12 { color: black; font-family:Symbol, serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s13 { color: black; font-family:Wingdings; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s14 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 9pt; vertical-align: 5pt; } div.maincontent .s15 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 9pt; vertical-align: 5pt; } div.maincontent .s16 { color: black; font-family:Cambria, serif; font-style: italic; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s17 { color: #080808; font-family:"Times New Roman", serif; font-style: normal; font-weight: bold; text-decoration: none; font-size: 14pt; } div.maincontent .s18 { color: #080808; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s19 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 11pt; } div.maincontent .s20 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 10pt; } div.maincontent .s21 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: bold; text-decoration: none; font-size: 11pt; } div.maincontent .s22 { color: black; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; text-decoration: none; font-size: 11pt; } div.maincontent .s23 { color: black; font-family:"Times New Roman", serif; font-style: italic; font-weight: normal; text-decoration: none; font-size: 14pt; } div.maincontent .s24 { color: #212121; font-family:"Times New Roman", serif; font-style: normal; font-weight: normal; tex

Terminology Standard aims to standardize the concepts and phrases used in standardized documents; these terms are used as basic concepts to allow linking standardized contents together. Terminology standardization helps the parties involved in the construction and use of TDD to have a common language.

Standards on spatial reference systems: in Vietnam today, the standards on national reference systems and coordinate systems VN-2000 have been issued, creating a foundation

unified reference basis for measurement data in general and geographic information data in particular. This standard includes provisions on:

- Scope of application for all coordinate systems of all levels, topographic maps, base maps, cadastral maps, national administrative maps and other specialized maps.

- Parameters of the reference system: Global WGS-84 Ellipsoid has dimensions: rotational angular velocity, gravitational constant, positioning and national coordinate origin.

- Map projection grid: Use a horizontal cylindrical projection grid at right angles to the projection zone 30 with a length deformation ratio adjustment coefficient k0 = 0.9999; the central meridian depends on each specific locality and region.

Geographic data structure model standard: the standard on the data structure model will specify how the structure of geographic information data is organized and built. For basic geographic information applied according to the national geographic data structure model standard, technical documents and regulations for creating topographic maps of all scales include regulations on the representation of structural models, primitive data types, basic data structures, general geographic object models, etc.

Standards for classifying geographical objects: standards specify methods for classifying objects, standards for classifying objects will define types of geographical objects along with their attributes and relationships; standards clearly state the classification, identification, and meaningful content of each type of object, and also specifically describe the relationships between objects and the required attribute data of each object.

Geographic data representation standard: a standard that defines a mechanism that allows datasets to be presented in different ways without changing

Data content; construction methods based on published standards for digital map presentation and design and editing of standard symbol sets for the database.

Spatial data quality standards: this standard specifies the quality assessment process, data quality is divided into: quantitative quality and non-quantitative quality. Quantitative data quality factors include the completeness of objects, attributes and their relationships, logical consistency of concepts, domain values, format, topology, attribute relationships, accuracy of values, location, time..., non-quantitative data quality factors include the purpose, origin, application that the dataset has been used for.

Metadata: Metadata is a type of data that describes information related to the status of data in the database; this information indicates what data is being stored in the database, the method of data collection, processing and integration, the time of data construction, data update, data quality, data legality, data storage method, data access and distribution procedures.

Data encoding and exchange standards: spatial data needs to be encoded based on a certain rule in a computer understandable format, data encoding is considered in two aspects: for storage and for exchange. The standards on content model and data structure as described above create the basis for building a standard data set. The provincial HTTDL database basically complies with the National technical standards on geographic information issued by the Ministry of Natural Resources and Environment.

* Spatial data of water resources database uses VN-2000 National reference system and coordinate system:

- WSG-84 reference ellipsoid with dimensions:

+ Major semi-axis: 6,378,137 m;

+ Flatness: 298, 257223563;

- Map projection grid: Use a horizontal cylindrical projection grid at right angles to the projection zone 30 with a length deformation ratio adjustment coefficient k0 = 0.9999; the central meridian depends on each specific locality and region.

In the ArcGIS software system, the VN-2000 reference system parameters are specified as follows:

Table 2.2. VN-2000 reference system parameters

Projection: Transverse_Mercator

In which the central meridian parameter (Central_Meridian) is changed according to the central meridian parameter of each province and region according to regulations.

- Resolution (XY Resolution) = 0.001 m.

2.3.1.4. Choosing construction software

Depending on the purpose and source of documents used, the water resources database must be selected on a suitable platform. The selected software must ensure:

- The software is popular but must be highly professional in creating databases.

- The software must handle digital maps well and is widely used today in research and production agencies.

- Data and display software can be linked together, exchanging data with each other.

- Tend to want to connect with digital map processing software such as ArcMap; MapInfo.

- The analysis and conversion of data according to administrative unit boundaries can be converted into a database according to hydrological units and performed through the functions of digital map processing software.

* Build database functions

Depending on the different types of data, the specific functions of each type of data are also different. However, the main problem is still storage, access and conversion. The construction of these functions is carried out from the perspective of "maximum friendliness" for convenience in using the database later with the criterion of least reference use (the basic interfaces can be seen in the main results section below). The functions of the database are built in groups

Create menus by writing code in Visual Basic Application, Macro, SQL of ACCESS...

* Database testing: testing of database functions is integrated into the database construction process.

2.3.1.5. Database content structure in GIS environment

The water resources database is built in a GIS environment, a geographic information software system developed by Esri (USA), expected to use ArcGIS version 10.2.2, managed in the national coordinate system VN-2000 using open ArcGIS software, allowing easy updating, editing, supplementing, decentralizing management, accessing and exploiting information.

Water resources database includes two main information blocks: spatial data and attribute data. To form the database content structure in GIS environment, it is necessary to:

* Collect and define software requirements

- Purpose: to determine functional and non-functional requirements of the software.

- Implementation steps

+ Collect software requirements: Collect functional requirements. Collect non-functional requirements.

+ Determine functional requirements:

Identify and describe the software actors. Identify and describe the use cases.

Identify factors that influence the complexity of each use case including: number of transactions, GIS technology application, inheritance.

+ Identify non-functional requirements:

Identify software development needs.

Determine the complexity of the software installation. Determine the security requirements.

Identify multi-user requirements. Identify other non-functional requirements.

+ Convert use cases.

* Detailed business modeling

- Purpose: to model in detail the processes and operations of an organization using UML language.

- Steps to follow:

+ Detailed modeling of processes and operations: Identify a list of business processes. Describe each business process in detail.

+ Build a business use - case diagram: Identify business use cases.

Identify business actors.

Identify the relationship between business actors and business use cases.

Identify relationships between business use cases.

* Design

- Purpose: to design detailed software based on the results collected and analyzed in the above steps. The product of this step is used for the programming and testing phase.

- Steps to follow:

+ Software architecture design.

+ Design use case diagrams.

+ Design activity diagram.

+ Design sequence diagram.

+ Design class diagram.

+ Database model design (database model design; enter sample data to test database model).

+ Software interface design.

- Product:

+ Database model in XML format.

+ Report explaining the database model.

+ Software interface design report.

* Programming

- Purpose: write source code based on detailed software designs.

- Steps to follow:

+ Write source code.

+Source code integration.

* Testing

- Purpose: to detect errors in the software and make repairs to ensure the software meets the requirements.

- Steps to follow:

+ Check source code according to coding convention.

+ Check ingredient levels.

+ Check system level.

2.3.2. Data entry and processing methods

The water resources database is built from the following 04 documents:

- Cadastral database (from the land database, select water resource data such as hydrological data: lakes, dams, dikes; point-type hydroelectric projects; river system comparison);