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How to download SRTM 1/3 arc to Locusmaps?
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How can we download SRTM 1/3 arc second digital elevation to Locusmaps?
I am finding that the current elevation profile in Lomaps is not accurate in many places in USA WA state, and I suspect it is due to lower granularity.
Pls advise.
The same question
I have Lomaps for USA WA state along with latest elevation data provided by Lomaps. Elevation granularity is not good enough for mountains.
I have Lomaps for USA WA state along with latest elevation data provided by Lomaps. Elevation granularity is not good enough for mountains.
Hi, copy the data in HGT format (1° tiles) into /Locus/data/srtm directory and restart the app.
Hi, copy the data in HGT format (1° tiles) into /Locus/data/srtm directory and restart the app.
Michal, appreciate your response.
it seems to be really complicated to get the HGT files for SRTM 1/3. They are not in viewpanaromas web site (which is outdated and not maintained for years). and USGS bulk downloader does not install on windows anymore because the app is downloader app is old, and requires a really old version of Java which oracle has removed from its web site (likely because it has many security issues).
Michal, appreciate your response.
it seems to be really complicated to get the HGT files for SRTM 1/3. They are not in viewpanaromas web site (which is outdated and not maintained for years). and USGS bulk downloader does not install on windows anymore because the app is downloader app is old, and requires a really old version of Java which oracle has removed from its web site (likely because it has many security issues).
Then I'm sorry, there is no other way how to get custom elevation data into Locus.
Then I'm sorry, there is no other way how to get custom elevation data into Locus.
blahdi,
have you looked at this list with URLs?
https://www.opentopodata.org/datasets/srtm30m_urls.txt
from page
https://www.opentopodata.org/datasets/srtm/
So you can mimik a bulk download, which is a script in fact with the subset you need. Login credentials needed, though.
Registration: https://urs.earthdata.nasa.gov/
blahdi,
have you looked at this list with URLs?
https://www.opentopodata.org/datasets/srtm30m_urls.txt
from page
https://www.opentopodata.org/datasets/srtm/
So you can mimik a bulk download, which is a script in fact with the subset you need. Login credentials needed, though.
Registration: https://urs.earthdata.nasa.gov/
Weird. If they have the right name in the right place, and Locus has been restarted after copy, does Locus give an error or does it try to download elevation?
Weird. If they have the right name in the right place, and Locus has been restarted after copy, does Locus give an error or does it try to download elevation?
https://fileproinfo.com/tools/viewer/hgt#
claims to view hgt files, so you might want to check the content, too.
I have not worked with that site, though.
https://fileproinfo.com/tools/viewer/hgt#
claims to view hgt files, so you might want to check the content, too.
I have not worked with that site, though.
Found the problem - Locusmap recognizes the HGT files from that link, but it expects all HGT files in a single directory. Does not work if HGT files are in subdirectories, and each file extracts to a separate subdirectory. Locusmap also does not parse zip files.
Essentially, these limitationsmakes the extraction process really manually cumbersome and can take 1 full day for single US State - not feasable for most people. It needs to be done once and distributed to everyone via Lomaps.
Found the problem - Locusmap recognizes the HGT files from that link, but it expects all HGT files in a single directory. Does not work if HGT files are in subdirectories, and each file extracts to a separate subdirectory. Locusmap also does not parse zip files.
Essentially, these limitationsmakes the extraction process really manually cumbersome and can take 1 full day for single US State - not feasable for most people. It needs to be done once and distributed to everyone via Lomaps.
And, these files appear to be 3 arc second. Not 1/3 arc second.? I could not verify it..
And, these files appear to be 3 arc second. Not 1/3 arc second.? I could not verify it..
I found this thread which renamed BIL file - i will try it out.
https://help.locusmap.eu/topic/srtm-hgt-file-handling
I found this thread which renamed BIL file - i will try it out.
https://help.locusmap.eu/topic/srtm-hgt-file-handling
That does not answer your question about what this web site provides - 1" or 3" :-)
That does not answer your question about what this web site provides - 1" or 3" :-)
Again, as you did the wget thing and unzipped: What did you get as hgt? 3 MB or 25 MB?
Again, as you did the wget thing and unzipped: What did you get as hgt? 3 MB or 25 MB?
I think I successfully converted a BIL file - SRTM 1 arc second to HGT using GDAL translate. I tested it on Locusmap Pro, and slope angles and terrain looks more detailed. The file size is 25MB
https://gis.stackexchange.com/questions/385962/srtm-hgt-to-geotiff-conversion-using-gdal
Now, I have to figure out how to convert the entire set of files for Washington state. Or, maybe instead I will convert some specific areas.
I think I successfully converted a BIL file - SRTM 1 arc second to HGT using GDAL translate. I tested it on Locusmap Pro, and slope angles and terrain looks more detailed. The file size is 25MB
https://gis.stackexchange.com/questions/385962/srtm-hgt-to-geotiff-conversion-using-gdal
Now, I have to figure out how to convert the entire set of files for Washington state. Or, maybe instead I will convert some specific areas.
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