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what are YOU getting for Kanchanjunga??? #13
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https://dds.cr.usgs.gov/srtm/version2_1/SRTM3 is permanently shut down. I email USGS yesterday and they confirmed that link is no longer supported. GeoTIFF is fully supported by USGS delivery site. The user interface at the new delivery site takes a LOT of learning but it works. I posted a small Python code to read elevation from USGS SRTM GeoTIFF https://github.com/nicholas-fong/SRTM-GeoTIFF gdallocationinfo n27_e086_3arc_v2.tif -wgs84 86.925278 27.988056 (Everest 珠穆朗玛峰, 8765 m peak OpenStreetMap) gdallocationinfo n27_e088_3arc_v2.tif -wgs84 88.146667 27.7025 (Nepal Kangchenjunga 8586 m peak OpenStreetMap) Download from USGS EarthExplorer (1 Arc-Second) of the GeoTIFF, things look a little bit better: gdallocationinfo n27_e086_1arc_v3.tif -wgs84 86.925278 27.988056 (Everest 珠穆朗玛峰, 8765 m peak OpenStreetMap) Not a bad result: https://oceanservice.noaa.gov/facts/highestpoint.html#:~:text=Mount%20Everest%2C%20located%20in%20Nepal,from%20which%20elevations%20are%20measured. gdallocationinfo n27_e088_1arc_v3.tif -wgs84 88.146667 27.7025 Last attempt: gdallocationinfo n27_e088.tif -wgs84 88.146667 27.7025 (Nepal Kangchenjunga 8586 m peak OpenStreetMap) [n27_e088.zip] |
Is anyone able to get the published results for the sample test point: Kanchanjunga, lat: 27.7025, lon: 88.146667?
I've run the author's code, nicholas-fong's code, my code, and the gdallocationifo. None of them come up with the 'correct' elevation.
I think it's a problem with the hgt file I'm using, but can someone else confirm? What are YOU getting?
I downloaded the hgt file from https://dds.cr.usgs.gov/srtm/version2_1/SRTM3. Is there another source? I tried the version1 data with the same result.
Here's the gdallocationinfo that shows the same answer that I am getting.
gdallocationinfo N27E086.hgt -wgs84 86.925278 27.988056
Report:
Location: (1110P,14L)
Band 1:
Value: -32768
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