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2

In addition to what has been mentioned there are a few more things to consider. You can enhance the 3-dimensional impression of the map by not only varying the color hue but also the saturation, brightness and vibrance. Saturated colors will appear closer and are suitable for mountain tops while the lowlands and valleys can be colored rather unsaturated or ...


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Ok, I solved. I use Global Mapper instead of GRASS or QGis. There is an option to add elevation data to all vertices from the dtm. Then I exported the vector as a dxf. I still have in Autocad a 3D DXF. Great and easy! :)


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Is the GNSS receiver providing NMEA data? If so, is the GSV sentence provided? If so, the elevation in degrees is provided in that specific sentence. http://aprs.gids.nl/nmea/#gsv


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You might consider the Shuttle Radar Topography Mission (SRTM) 30 product, which is a coarse resolution near-global 30-arcsecond DEM. You can download the data at the following FTP site: http://dds.cr.usgs.gov/srtm/version2_1/SRTM30/ There is also the GTOPO30 elevation data set that is commonly used for these applications. EDIT The GTOPO30 dataset has ...


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i worked on SRTMGeoTIFFReader and this is what i give All i want is the coordinate of 4 corner of my geotiff pic like this : Corner Coordinates: Upper Left ( 69.7357061, 29.87658367) Lower Left ( 69.7357061, 28.19226367) Upper Right ( 86.6125061, 29.87658367) Lower Right ( 86.6125061, 28.19226367) Center ( 781741.061, 2903442.367) have you any ...


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if you compute the statistics of your raster, (or with zonal statistics if you look for a specific zone), you can find its maximum value (properties > source > Statistics > max) Then you can use the value in raster calculator Con("raster" == maxvalue, 1) EDIt: where maxvalue is either the raster created by zonal statistics or the value that you read in ...


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Since you appear to use a vector representation of the routes, you may first split it into short segments (in order to later have a representative view on slope etc), using v.split; then add a new column to the attribute table of that road map: "slope double precision" using v.db.addcolumn; eventually upload the respective road segment slopes to the ...


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Since 2013 there is the EU-DEM 25 m: new Digital Surface Model (DSM), representing the first surface as illuminated by the sensors. You can download the GeoTIFF files here: http://www.eea.europa.eu/data-and-maps/data/eu-dem#tab-gis-data In 2014/2015 there will be the release of the worldwide SRTM 30m data as announced here: ...



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