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 ...

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Resampling methodology when projecting a raster

When projecting an SRTM raster with "Project Raster" tool in ArcGIS10.2, what is the best resampling methodology, bilinear ot cubic convolution?
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37 views

how use height tag data in Project-OSRM

I am using Project-OSRM in my project . All is works . But I need use elevation data. Downloaded osmosis master . And SRTM plugin added to osmosis. Also this worked fine . SRTM plugin started and I ...
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34 views

DEM error when trying to do topographic correction in GRASS

I'm new to GRASS gis and I'm trying to do a topographic correction (i.topo.corr) of 9 ASTER bands using SRTM dem. I keep getting this error message: ERROR: Illumination model is of CELL type Is ...
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NASA SRTM: precipitous contour lines in TileMill

I was trying to make a nice looking print map of Bali (Indonesia) in TileMill. After creating a terrain layer (using this walkthrough) I noticed that the island's coastline was precipitous. Is ...
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115 views

Using gdalwarp with multiple elevation models

I'm trying to use gdal_warp to slice and convert some SRTM data. The data I'm interested in are in S30E152.hgt and S30E153.hgt. What I'd like to do is: Convert these DEM files from EPSG:4326 to ...
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100 views

SRTM elevation data question

I have a question concerning the SRTM elevation data (http://srtm.usgs.gov/). As a little thought experiment, assume I want to build a 3D model of the earth's surface as a point cloud. The earth's ...
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31 views

Converting DEM data to height information in meters using QGIS? [duplicate]

I'm relatively new with QGIS and currently I'm working with ASTER and SRTM DEMs. The goal is to create vector heightcontours with labeling in meter. Can you tell me how I can convert the grayband ...
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425 views

How do you convert SRTM HGT elevations from WGS84 into meters above sea level?

I am building a JavaScript script that reads binary HGT files - as generated by the SRTM - and converts the data into bitmaps viewable in your browser. You can try out the script and view the source ...
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112 views

Efficient computation of path profile with Numpy and GDAL

I have numpy array with SRTM elevation data and I need calculate path profiles - vectors with elevation data from one point (transmitter) to every points of my map. Here's my current solution: def ...
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163 views

What is most suitable DEM to delineate watershed (from spot height, ASTER and SRTM)?

I have three DEMs of our country which are spot height DEM, SRTM DEM and ASTER DEM. SRTM has 90m resolution and ASTER has 30m resolution. My supervisor told me to delineate watershed using these ...
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119 views

How to convert DTED Level 1 into SRTM DTED

We have a GIS tool that handles only SRTM DTED level 1 terrain files. SRTM level 1 terrain files are limited to 60 deg lat. So I need to fill up the gap from 60 lat up to 90 deg lat. I have DTED ...
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101 views

Elevation value (in meters) from SRTM [closed]

How do I determine elevetion/terrain height value from SRTM data?
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1answer
134 views

cut square from geotiff

i want to make a 3d modell out of the mount everest and some other mountains. what i need therefore is a 14km² square around the peak from the mountain. so basically i use qgis to extract the area ...
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1answer
3k views

How can I convert SRTM data to DEM or DTED?

i am working on a project which is not commercial and i need some digital elevation data for visualization. in net i have found a link and i have downloaded .asc data from following link.. SRTM Data ...
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1answer
411 views

How to transform a DEM to a cartesian coordinate system?

I am using the script r.inund.fluv. I run the script with all the required parameters and it produced a lot or errors. I emailed the author of the script and he said that "I think you are not ...
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2answers
674 views

Why is this SRTM TIFF not visible in GRASS GIS 6.4.3?

I want to use interpolated SRTM data for Germany to generate an STL terrain map for use in a CFD application. My SRTM data comes from the OpenDEM project. SRTM data normally has voids, but this data ...
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1answer
203 views

Gdal_polygonize: How to filter pixels above a given value (elevation)?

Given a topographic GIS raster of one country: Given an elevation threshold n = 50 (meters) How to polygonize pixels when z >= n ? gdal_polygonize.py is not clear on this point. It states This ...
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6 views

Morphometric analysis tutorial [on hold]

I want to analyze morphometric parameters such as drainage density,stream order,bifurcation ratio etc of a small basin area. Here I want to use SRTM dem and arcgis tool. Please share if any one have ...
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18 views

DEM data for Borneo island (higher resolution data than SRTM/ASTER GDEM for South East Asia?)

I am looking for high resolution DEM data for Borneo island and am especially interested in Sarawak. Currently I only found SRTM and ASTER GDEM data (normal products from NASA REVERB ...
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33 views

Slope and Curvature values

From an SRTM DEM I have calculated the slope of the terrain with values that range from 0 to 77 (degrees). I have also calculated the curvature of the terrain and the statistical characteristics of ...
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1answer
35 views

How to obtain elevation value from given SRTM data on mouse click in web browser?

I need JavaScript code for obtaining elevation data from SRTM tiff image. I have used Google APIs, but I need for downloaded SRTM tiff image. (SRTM file is being loaded on a base layer, and both ...
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1answer
82 views

how to batch reclassify rasters with percents range

Using Model Builder I need to reclassify slope rasters with percents range value. I have read and ask here batch reclassify rasters with different elevation ranges, but I still need more explanation. ...
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29 views

How to smooth raster data? [duplicate]

I want to print a map of an island based on SRTM data but the basic raster layer looks pixelated especially at the transition to the ocean. Is there a way to smooth it?
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155 views

How to import SRTM data for the whole planet into TileMill

I need to get SRTM elevation data for the whole planet into TileMill. I already walked through the instructions on Steve Bennett's blog and it worked fine for small areas. The problem is now that for ...
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1answer
116 views

gdalbuildvrt error when mosaicking SRTM data with different NoData values

I'm attempting to mosaic together 9 SRTM tiles downloaded from CGIAR to produce a DEM of Borneo. I'm using: gdalbuildvrt Borneo.vrt BorneoSRTM/*.tif where BorneoSRTM contains the 9 tif files to be ...
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1answer
66 views

How to determine stream elevation points from SRTM raster with stream lines vector?

I should determine elevation points of some streams. I have SRTM raster and stream vectors. Which tools can solve this problem in ArcGIS 9.3? Anybody can write me a workflow how to do this task? ...
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174 views

Importing SRTM Data into Grass

I am having issues importing an SRTM HGT file into Grass. I first made a new location as the instructions from this Grass Newsletter Tutorial states. I then went to the download site and downloaded ...