Questions tagged [srtm]
The Shuttle Radar Topography Mission (SRTM) obtained elevation data on a near-global scale to generate the most complete high-resolution digital topographic database of Earth. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000. As of 2016, it is now almost universally available at 1-Arc Second resolution.
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How to extract elevation using contours in Google Earth Engine?
I want to extract the elevation values and generate contour lines from SRTM DEM at a 100 m intervals. However, I was able to create the contour lines using a code available here. But I am not able to ...
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Lines Visible When Blending Raster Layer of Merged Tiles QGIS
After merging SRTM DEM tiles into 1 raster layer, the layer has no visible join lines on the map canvas as below. Multiply blending mode has been applied
However, when viewed in Layout, there is a ...
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Creating color physical map using SRTM V2 GeoTIFF tiles in QGIS
Trying to make a physical map (don't pay attention to the colors, I'm experimenting). The map is based on DEM SRTM V2.
But I have experienced some trouble with making a smooth transition between ...
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Is there a DEM WCS for the whole globe?
I've found some for a few individual places, but I am struggling to find one for the whole globe.
North America | https://elevation.nationalmap.gov/arcgis/services/3DEPElevation/ImageServer/WCSServer?...
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Convert ERA5 data on zero degree level into meters above sea level
I am trying to calculate the zero-degree isotherm (altitude in which temperature is at 0 degrees) in meters above sea level. I used ERA5 data by ECMWF for this and I noticed that the values decrease ...
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Error: Computed value is too large, while trying to extract all the elevation values in GEE
I am trying to extract all the elevation values of a region using the NASA SRTM Digital Elevation 30m data set as a CSV file. But it is showing the error FeatureCollection (Error)Computed value is too ...
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Canadian GeoTIFF .tif to SRTM .hgt
I was asked recently whether Canadian GeoTIFF files could be converted to SRTM files to be used with a radio propagation program. Reading through the various posts it seems that this could be done ...
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SRTM raster looks pixelated with hillshade style in QGIS when zooming in
I have a project and I want to create a map using SRTM as a background.
I upload it ... and it looks like that:
But my project area is smaller, so I need to zoom it ... and when I do that, my SRTM ...
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Getting high resolution DEM for a location [closed]
As a part of my project, I want high resolution (10m approx) DEM for my desired location.
How and where can I get it?
I already tried with 30m DEM obtained from USGS.
I am getting blurry DEM, if I ...
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Sun's Mesh Denoise algorithm not working (feature preserving smoothing)
I tried to use Sun's denoise algorithm for elevation data via the RCP project from Jake but I cannot observe any changes to the TIF file:
python raster_chunk_processing.py -m mdenoise -t 0.9 -n 10 -v ...
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Find corresponding OSM ways to a set of coordinates
I'm currently building a routing application that is based on the Open Source Routing Machine (OSRM), which uses OSM data. For the routes i am trying to generate elevation profiles using SRTM data.
So ...
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SRTM hillshade looks weird in QGIS
I am using QGIS 3.18.
My .hgt SRTM files downloaded from the USGS website looks OK except when I try to apply hillshade to it. The parameters that I have used are summarized on the screenshot below. I ...
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Blocky SRTM hillshade in QGIS
I have downloaded some SRTM topography data, which I've re-projected to a projected coordinate system and displayed as a hillshade. As seen in the attached screenshot, the product looks blocky, with ...
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Strange behaviour in Z Cartesian axis when creating 3D Point Cloud
I'm working on a tool to convert SRTM data to Cesium 3D Tileset Point Cloud.
All is working fine as you see here:
And in this video ( subtitle in portuguese): https://youtu.be/zroGesdS-OI
Well... My ...
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Change resolution of SRTM
Currently, I am trying to change the resolution of an SRTM downloaded via SRTM Downloader.
Problem is the following: I need it in 1 Pixel Resolution but can't find a working way, either the heightmap ...
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''pixelatted'' ''griddy'' result from slope function (QGIS) [duplicate]
I use the SRTM downloader to download my DEM's, then it happens very often that when I create a slopemap there are weird artefacts in the slope map. Something I do before making the slopemap is ...
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GDAL resample 30m file to 90m
I have an SRTM file in DTED format obtained from EarthExplorer spanning 1 degree latitude by 1 degree longitude and containing 3601x3601 pixels at 30m spacing. The pixel size resolution is 0....
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QGIS "Profile Tool" Plugin inaccurate reading
I'm getting an inaccurate reading from QGIS "Profile Toll" plugin as you can see in the image below.
Not only is showing incorrectly which of these two peaks is the highest, but also the ...
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Removing no data in raster (DEM) using ArcMap
I'm trying to work with this DEM in ArcMap, which is TANDEM. But, I have areas where the altitude is not normal, since it tends to shoot (which are the areas that look like clouds).
How can I fix the ...
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SRTM 1arc second bulk download
This has been asked before, I am aware, but the web links seem to all be obsolete.
Using EarthExplorer, I can get the dataset and I can download... each tile individually.
I do not want to get any ...
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Seeking SRTM 90m data
I'm looking for 90 meter resolution SRTM data to coverage a large state in the Western US. I used to use Derek Watkins' awesome tile grabber for SRTM90: https://dwtkns.com/srtm/
but as he explains on ...
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Using a DSM and DEM together to identify height above ground
A pretty basic question I feel, but its something I thought I understood and further reading has caused more confusion.
DEM is the topographical/elevation of the ground. DTM and DSM are pretty much ...
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R script SRTM DEM
Someone who has experience with R in Qgis can help me with this problem.
I have a script that works perfectly in R making downloads SRTM DEM and cuts to the desired polygon.
But I can't implement it ...
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How to compress DEM SRTM files?
I'm trying to compress my 1.2GB DEM file to reduce its size through the OSGeo4W Shell, but it's not working, as the command only works for RGB images (3 bands), but my DEM only has 1 band (1-band).
I ...
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Convert SRTM DEM GeoTIFF to XYZ tiles
I have SRTM DEM of whole country covering large area. It takes too much time to load in to QGIS and freezes the system while zooming in and out.
Is there any way to use this SRTM as XYZ tile in QGIS, ...
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I am trying to download images using SRTM download, but then this error pops up after the download has been completed
2021-05-26T13:28:44 WARNING Traceback (most recent call last):
File "C:/Users/Paul Maritz/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\SRTM-Downloader\download.py", ...
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SRTM elevation data download error QGIS
I am trying to download SRTM rester data in QGIS for a specific area. See image below:
I am using SRTM-Downloader plugin and when I click on download the following error pops up. Any idea about what ...
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GDAL Slope function not working with SRTM DEM data?
I'm a QGIS rookie trying to generate slope data for research projects in South Africa.
I've managed to download DEM data from Bing Aerial maps using the SRTM-downloader but cant get the GDAL slope ...
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Grid UTM coodinates in Google Earth Engine [closed]
I am trying to use GEE to make maps intended for use on trails with compasses. I have already managed to place the contour lines but I couldn't put the grids with UTM coordinates.
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Failing to download SRTM data from USGS
I was used to download SRTM/DEM data from the following link: https://dds.cr.usgs.gov/srtm/version2_1/SRTM3/
But I'm not being able to download anymore, I don't know the exact causes of that, it was ...
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Get DEM from Google Earth Engine
How can I get ASTER or SRTM DEM for years like 2016, 2020,... in Google Earth Engine? I can't filter date for SRTM DEM in GEE. It seems that SRTM DEM doesn't have multi-year data, it was captured only ...
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What CRS should I convert my WGS84 (unprojected) SRTM data to for slope calculations?
I have SRTM data at 90m resolution downloaded and I need to calculate slope (in degrees). I'm using the GDAL python library and command line tool for everything. GDAL can read in hgt files (SRTM files)...
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Getting unexpected DEM spatial resolution using ArcMap
I have downloaded SRTM DEM 30 m. However, when I displayed on ArcMap, I got a DEM raster with 0.0002777 cell size.
How can I solve this problem?
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Extracting Factors Causally Related to Landslides from DEMs (SRTM) [closed]
I have the SRTM dataset, and I've managed to write some python code to show elevation and slope heatmaps. The code runs fine, and the elevation data is reliable (I checked some points from the web), ...
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undecodableError: invalid start byte when processing SRTM data
Downloading SRTM-Data using the QGIS-SRTM-Downloader plugin works fine. I now do want to process this image data further by using the contours plugin within the extraction tools of raster data, but ...
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Flatten/smooth/reduce noise in SRTM elevation maps
Is it possible to "flatten" some areas in an elevation map using GRASS?
For example I have an elevation map of Iraq. I'd like to smooth out the mostly flat areas while still keeping things ...
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How to fix SRTM half-pixel shift with GeoServer
The SRTM data has an half-pixel shift (I assume that’s what is described in the last FAQ, and that GeoServer uses pixel corner origin ? I couldn’t find this information).
Despite this shift being ...
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Prepare DEM in QGIS to open in Blender [closed]
I have been having trouble loading 30m SRTM files into blender.
I download the SRTM (DEM) 30m files from the earthdata (NASA) website and I would like to prepare them in QGIS (making mosaic, clip, ...
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Unable to open hgt downloaded from dds.cr.usgs.gov
I downloaded a SRTM hgt file from https://dds.cr.usgs.gov/srtm/version1/SRTM30/w100n40/w100n40.dem.zip, after unzipping I am not able to open it in QGIS or even gdalinfo. I downloaded other hgt files ...
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Raster artefacts after saving to GeoTIFF in QGIS
When processing DEMs created using downloaded SRTM data (initially HGT files) I produce a nice-looking product; however, saving this as a GeoTIFF creates square artefacts which are plain to see (and ...
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gdal translate resampling -r flag has no effect?
Whenever I add a resampling parameter (-r) to my gdal_translate commands, it seems to have no effect. For example the following two commands produce a binary exact result.
How can I get my image to ...
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How to add elevation data to tif to create DEM (SRTM satellite data)
I have a .tif created from the SRTM satellite data. The tif should already be DEM data as it was collected from the SRTM satellite.
When I open the tif in ArcGIS, I don't see any height or z data, ...
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How can I export elevation layer data and OpenStreetMap layer data as shapefile in QGIS? [closed]
I am a newbie in QGIS looking to obtain elevation data with respect to a map. As I could not find any free elevation data, therefore I adopted the following approach.
Elevation data: I got the ...
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Conversion of EGM96 to NAVD88
I am new to ArcGIS and geoids/ellipsoids, and I want to convert a dataset in EGM96 (the USGS SRTM DEMs) to NAVD88. I have the SRTM dataset from NASA downloaded and open in ArcGIS as .hgt files.
I ...
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Why are SRTM tiles (*.tif) not visible in my QGIS project?
I am wondering, why my SRTM tiles are not displaying correctly in my QGIS (3.10.4 LTR) project. If I load vector layers to an empty QGIS project first, they are visible and the later added SRTM are ...
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DTED file project get squared by QGIS
I am quite new to the GIS world and I am trying to work with some DTED file from the SRTM project on QGIS. Unfortunately, when I add it as raster layer the program automatically shape it as a perfect ...
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Load all SRTM data into PostGIS
I am trying to load all the SRTM data into a PostGIS database. I tried the process described here: https://postgis.net/docs/using_raster_dataman.html
It created a giant SQL file. When I tried ...
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Use "SRTM Downloader Plugin" with "QGIS 3.4"
Edit (TL;DR): As Gabriel De Luca pointed out in his answer there is an open GitHub ticket about the issue.
I would like to use "SRTM Downloader Plugin" with "QGIS 3.4" (OS: Win7, 64-bit).
Now if I ...
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How to convert DHHN2016 to mean sea level?
I am new to GIS. How can I convert DHHN2016 to mean sea level?
I am using this dataset https://www.opengeodata.nrw.de/produkte/geobasis/hm/dgm1_xyz/dgm1_05314000_Bonn_EPSG4647_XYZ.zip which I stiched ...
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How to compare two DEMs?
I am new to GIS and I want to compare two DEM raster .tiff files, i.e. I want to compute differences between height values etc.
How can I determine if the two tiff files are comparable?
I have read ...
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