If you rather python, this question show some code examples.īy looking at the data from index.js and from Matlab, it seem that if you move the extra element at the end of row one, to be the first of row two, and then the last of two to be the first of the third row and so on, you will end up with the correct 1201x1201 data matrix. You can load it directly in Matlab with the following code: fileID=fopen('S40W067.hgt','r') % Replace by your HTG fileĭata = fread(fileID,'uint16',0,'b')
htg file directly in Matlab, it produce a nice 1201x1201 matrix. It indeed show that the first row has 1202 columns, the last 1200 columns and all the rest 1201 columns. Converter also supports more than 90 others vector and rasters GIS/CAD formats and more than 3 000 coordinate reference systems. Then loading the csv in matlab in fact produced an error of inconsistency in the number of columns per row.īy counting the number of commas per line using: sed 's///g' heights+cr.txt | awk '' The process to convert DEM to HGT is: Use the file opener listed above to open the DEM file Find the menu edit option to save as. Our online converter of SRTM HGT format to format (SRTM to USGSDEM) is fast and easy to use tool for both individual and batch conversions. hgt file, then replaced the "]," doing cat heights.json | sed 's/\],\' | tr -d '[' > heights.csv There are no header or trailer bytes embedded in the file. The spatial reference system is the world geodetic system 1984 ( EPSG:4326) and vertical datum EVRS2000 with geoid EGG08 ( EPSG:5730 ).
Convert .hgt files to .dem full#
Here is the relevant part of the documentation: 3.1 DEM File (.HGT) The DEM is provided as 16-bit signed integer data in a simple binary raster. hgt files are 16bit integer format, so the height values are rounded to full metres. I just replicate what you did but differently, and got to the same result: This program convert them to little endian.
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