The 1: 50,000 sheets are well known in the cartography of many countries, initially they were built with Datum NAD27 for America. In this case I have generated them in WGS84; It is wrong to believe that you can change projection just by moving a vector as some people do for small regions.
If you remember, before I had uploaded the zones, I have now uploaded the same zones but with the reticule of the 1: 50 000 sheets, making the clarification that it is called 1: 50,000 sheets because this is the dimension used in some countries for printing this cartography however the ideal name would be 1'30 »sheets by 1 ′
These sheets are made from the geographical coordinates and are 1'30 »longitude by 1 ′ of latitude, which makes them straight segments that build arcs that from the equator are closed as they approach the pole; that implies that within a zone there is not a single vector of these that has the same inclination angle.
This is why these sheets should be constructed from geographic coordinates, see this example:
Using the leaf at the right end of the 14 zone on the south coast of Mexico is approximately 26,696 meters long at the same end, but on the Atlantic coast it measures 26,171 meters, since it is closing at greater latitude.
For my last course it was necessary to create at least a couple of these areas to be able to explain their operation on the map scales. So, I had to resort to what I had at that moment; and that by the way it does very well:
How to create the grid
Using Manifold GIS is done in just two steps:
1. Create a new layer
File / create / drawing
Then we assign projection, right click on the "drawing", "assign projection", and choose UTM, zone 16, North
2. Create mesh
View / Graticle
I choose the grid of the 16 zone, which goes from the length 84 to the 90, I leave it negative because it is west of Greenwich. In both the latitude, from the equator and how I do not want it to reach the pole I choose from zero to 72. On the right I assign how often I want the mesh, which is the dimension of the 1: 50,000 sheets, these measure in my case 1'30 »longitude and 1 ′ latitude: to write 1'30» divide 1.5 between 60 that it would be 0.25 degrees and 1 / 60 that would be 0.166667 degrees.
It also gives me the option to choose if I want shapes (tiles), points, crosses ... I choose lines
then I click on the "create" button and "ok"
Creating the other zones is a matter of changing the projection. Once the UTM areas have been converted to Google Earth, this is the way they look (hiding the 16 zone that was the one I created initially).
There you can see that:
- Mexico is in the 11, 12, 13, 14, 15 and 16 zones. All in the northern hemisphere.
- Guatemala and El Salvador in the 15 and 16 zones
- Honduras, Nicaragua and Costa Rica in the 16 and 17 zones,
- Panama in the 17 and 18 zones
- Colombia in the 17, 18 and 19 zones, with the complication that it has both in the northern hemisphere and in the southern hemisphere,
- Peru in the 17, 18 and 19 zones,
- Bolivia in the 19, 20 and 21 zones,
- Argentina in the 18, 19, 20 and 21 zones,
- Chile in the 18 and 19 zones
- Brazil in areas 18 to 25 in the southern hemisphere and 19 to 22 in the northern hemisphere,
- Venezuela in the 18, 19, 20 and 21 zones
- Uruguay in the 21 and 22 zones,
- Paraguay in the 20 and 21 zones,
- Ecuador in the 17 and 18 zones.
This shows the UTM zones with the same Europa grid, from the 27 zone to the 37 zone; all in the northern hemisphere.
If you do not have GIS Manifold, here you can download the kmz file, which you can open with Google Earth:
If you are interested in having all the zones, in the following link you can acquire a file that contains all the UTM zones. Includes the areas:
you can acquire it with credit card or Paypal