Projections

viaEuropa supports the following map projections and tile matrices:

British National Grid (BNG), EPSG: 27700

Zoom Scale Resolution Tile Width / Height (metres)
0 10,000,000 2,800 716,800
1 5,000,000 1,400 358,400
2 2,500,000 700 179,200
3 1,000,000 280 71,680
4 500,000 140 35,840
5 250,000 70 17,920
6 100,000 28 7,168
7 75,000 21 5,376
8 50,000 14 3,584
9 25,000 7 1,792
10 10,000 2.8 716.8
11 5,000 1.4 358.4
12 2,500 0.7 179.2
13 1,250 0.35 89.6
14 625 0.175 44.8
15 312.5 0.0875 22.4

Alternative British National Grid (BNG2), EPSG: 27700

BNG2 supports the British National Grid but with an alternative tile matrix which uses x2 scale for each progressive zoom level. This is required by some GIS software for direct XYZ tile access.

Zoom Scale Resolution Tile Width / Height (metres)
0 20,480,000 5734.4 1,468,006.4
1 10,240,000 2867.2 734,003.2
2 5,120,000 1433.6 367,001.6
3 2,560,000 716.8 183,500.8
4 1,280,000 358.4 91,750.4
5 640,000 179.2 45,875.2
6 320,000 89.6 22,937.6
7 160,000 44.8 11,468.8
8 80,000 22.4 5,734.4
9 40,000 11.2 2,867.2
10 20,000 5.6 1,433.6
11 10,000 2.8 716.8
12 5,000 1.4 358.4
13 2,500 0.7 179.2
14 1,250 0.35 89.6
15 625 0.175 44.8
16 312.5 0.0875 22.4

Spherical Mercator (SPM), EPSG: 3857

Zoom Scale Resolution Tile Width / Height (metres)
0 559,082,264 156,543.0339 40,075,016.69
1 279,541,132 78,271.51696 20,037,508.34
2 139,770,566 39,135.75848 10,018,754.17
3 69,885,283 19,567.87924 5,009,377.086
4 34,942,641.5 9,783.939621 2,504,688.543
5 17,471,320.75 4,891.96981 1,252,344.271
6 8,735,660.375 2,445.984905 626,172.1357
7 4,367,830.188 1,222.992453 313,086.0679
8 2,183,915.094 611.4962263 156,543.0339
9 1,091,957.547 305.7481131 78,271.51696
10 545,978.7735 152.8740566 39,135.75848
11 272,989.3867 76.43702829 19,567.87924
12 136,494.6934 38.21851414 9,783.939621
13 68,247.34668 19.10925707 4,891.96981
14 34,123.67334 9.554628536 2,445.984905
15 17,061.83667 4.777314268 1,222.992453
16 8,530.918335 2.388657134 611.4962263
17 4,265.459168 1.194328567 305.7481131
18 2,132.729584 0.597164283 152.8740566
19 1,066.364792 0.298582142 76.43702829
20 533.182396 0.149291071 38.21851414