Mathematical basis for Vietnam map of groundwater resource at a scale of 1:50,000

22:55, 09/07/2024

Recently, the Ministry of Natural Resources and Environment of Vietnam issued Circular 15/2013/TT-BTNMT stipulating the technical standards for creating the Vietnam map of groundwater resource at a scale of 1:50,000.

The mathematical basis for the Vietnam map of groundwater resources at a scale of 1:50,000 is detailed in Article 6 of Circular 15/2013/TT-BTNMT as follows:

mathematical basis of groundwater resources map at a scale of 1:50,000, Circular 15/2013/TT-BTNMT

Illustration (source: internet)

The Vietnam map of groundwater resources at a scale of 1:50,000 is established in the VN2000 National Reference System and Coordinate System (UTM Projection Grid, WGS84 Ellipsoid, 60 grid zone, deformation coefficient k0 = 0.9996).

The central meridian of the groundwater resources map at a scale of 1:50,000 is determined according to table 1 below:

Table 1. Central meridian according to grid zones

Serial No.	Left Meridian	Central Meridian	Right Meridian
Zone 48	102^0^	105^0^	108^0^
Zone 49	108^0^	111^0^	114^0^
Zone 50	114^0^	117^0^	120^0^

The map frame, meridian grid, and parallel grid of the groundwater resources map at a scale of 1:50,000 display both systems of meridian and parallel grids and kilometer grids following the current regulations for topographic maps of equivalent scale. In cases where the map is established for localities, the topographic map system will use the grid zone with a central meridian appropriate to the geographical location of each province and centrally affiliated cities, as shown in Table 2 below:

Table 2. Central meridian of localities

No.	Province	Central Meridian	No.	Province	Central Meridian
1	Lai Chau	103^0^00’	33	Tien Giang	105^0^45’
2	Dien Bien	103^0^00’	34	Ben Tre	105^0^45’
3	Son La	104^0^00’	35	Hai Phong	105^0^45’
4	Kien Giang	104^0^30’	36	TP. Ho Chi Minh	105^0^45’
5	Ca Mau	104^0^30’	37	Binh Duong	105^0^45’
6	Lao Cai	104^0^45’	38	Tuyen Quang	106^0^00’
7	Yen Bai	104^0^45’	39	Hoa Binh	106^0^00’
8	Nghe An	104^0^45’	40	Quang Binh	106^0^00’
9	Phu Tho	104^0^45’	41	Quang Tri	106^0^15’
10	An Giang	104^0^45’	42	Binh Phuoc	106^0^15’
11	Thanh Hoa	105^0^00’	43	Bac Kan	106^0^30’
12	Vinh Phuc	105^0^00’	44	Thai Nguyen	106^0^30’
13	Hau Giang	105^0^00’	45	Bac Giang	107^0^00’
14	Dong Thap	105^0^00’	46	Thua Thien Hue	107^0^00’
15	Can Tho	105^0^00’	47	Lang Son	107^0^15’
16	Bac Lieu	105^0^00’	48	Kon Tum	107^0^30’
17	Ha Noi	105^0^00’	49	Quang Ninh	107^0^45’
18	Ninh Binh	105^0^00’	50	Dong Nai	107^0^45’
19	Ha Nam	105^0^00’	51	Ba Ria - Vung Tau	107^0^45’
20	Ha Giang	105^0^30’	52	Quang Nam	107^0^45’
21	Hai Duong	105^0^30’	53	Lam Dong	107^0^45’
22	Ha Tinh	105^0^30’	54	Da Nang	107^0^45’
23	Bac Ninh	105^0^30’	55	Quang Ngai	108^0^00’
24	Hung Yen	105^0^30’	56	Ninh Thuan	108^0^15’
25	Thai Binh	105^0^30’	57	Khanh Hoa	108^0^15’
26	Nam Dinh	105^0^30’	58	Binh Dinh	108^0^15’
27	Tay Ninh	105^0^30’	59	Dak Lak	108^0^30’
28	Vinh Long	105^0^30’	60	Dak Nong	108^0^30’
29	Soc Trang	105^0^30’	61	Phu Yen	108^0^30’
30	Tra Vinh	105^0^30’	62	Gia Lai	108^0^30’
31	Cao Bang	105^0^45’	63	Binh Thuan	108^0^30’
32	Long An	105^0^45’

More details can be found in Circular 15/2013/TT-BTNMT, effective from August 5, 2013.

Thu Ba

>> CLICK HERE TO READ THIS ARTICLE IN VIETNAMESE

0 lượt xem

- This translation is generated by OpenAI's GPT-4o model;
- The legal regulations in this article are according to Vietnamese Law;
- This English translation is for reference purposes only and not a definitive translation of the original Vietnamese texts;
- Articles may be compiled from a variety of sources;
- Applicable Terms may have expired at the time you are reading;
- If you have any questions about the copyright of the article, please contact us via email banquyen@lawnet.vn