I have a special grid* (data.gri ) free format, the grid values are initiated with label of latitude (φ) and longitude (λ) limits and spacing, the follows the data are stored row-wise from north to south in grid
φ1 (min) φ2 (max) λ1 (min) λ2 (max) Δφ (space lat.) Δλ (space long.)
dn1 dn2 ....................... dnm
....................................................
....................................................
d11 d12 ....................... d1m
The number of points in a grid file is thus
nn = (φ2-φ1)/Δφ + 1
ne = (λ2-λ1)/Δλ + 1
How can I limit a specific area, just a country (EGYPT), using the attached grid file, which is previously described, in order to have a topographic 3D map through MATLAB that looks like this one see attached
*The grid convert to GeoTIFF and text file [another format]
The attachment contained:
1-An example of the required output (image)
2-The grid in the special format (data.gri)
3- The grid in the GeoTIFF format
4-The grid in text format ( latitude, longitude, and height)
If you didn't solve this problem. you can send the data file or tell me which data type you are treated with by email. Then, I will check it and make it for you.
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