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4

Note that both methods below will export non smoothed polygons boundaries. You may have to resample your DEM file to get smoother lines or use further smoothing techniques. Step 1: Spatial Analyst (Classification) You could use Spatial Analyst to classify your data in 2 classes: 1 = data within the boundary values (example : elevation < X meter) 0 = ...


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You can use data from the Suomi National Polar-orbiting Partnership, but it is quite recent (since 2012). e.g ftp://ftp-npp.class.ngdc.noaa.gov/20150611/VIIRS-SDR/VIIRS-Day-Night-Band-SDR/ For longer time series, you can use NOAA DMSP datasets (1992-2013)


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You can set the GDAL_MERGE process up with QGIS using the GUI and that might be a good way to start testing. Also, test on two tiles that are next to each other first. I reckon it's something to do with NODATA. Please post your command in your question so that we can see how you're achieving the merge.


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Your issue is rooted in a well known GDAL Python gotcha - a dataset needs to be closed for it to be written to disk. In Python this happens when the object goes out of scope and is garbage collected or when you manually dereference it. This is usually done by setting it to None or deleting it. In your particular code the error is in the last line: del ...


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If you have numpy and scipy properly configured you could try out the LecoS plugin. Depending on your system you might also have to install the python imaging library (however it is often co-installed). Ether run it in directly in the processing toolbox or via the console (should be sth. like this for the mean. Not tested!) ...


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ASCII is an Esri format, you don't need to convert it first. That is assuming the files called .asc are really Esri ASCII Grid format and not just some other text raster format (like X,Y,Z). Open one in Notepad++ (or your other favorite text editor) and see that it conforms to this format: NCOLS xxx NROWS xxx XLLCENTER xxx | XLLCORNER xxx YLLCENTER xxx | ...


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For a quick 'heat map' view of your data: Use the Layer > Add Layer > Add Delimited Text layer menu option from QGIS Browse to your CSV file, and ensure your X and Y fields are being used properly: Click OK and you'll be asked what coordinate system to use. Assuming you're using LAT/LON in WGS84, choose EPSG:4326, then click OK and your points should ...


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Assuming it's in ArcGIS from your other posts... Repeat the following process three times, once for each of the values 1, 2 and 3. For example the 3's: Import the different bands to ArcMap separately. Repeat ten times**, once for each year: Create a raster where all values of 3 are replaced by 1, the rest are replaced by 0. In order to achieve this, Open ...


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Working on QGis version 2.8.2-Wien I mannaged to rasterize a line shapefile using the Treatment > Toolbox > GDAL/OGR > Conversion > Rasterize (vector to raster) script. My GDAL/OGR version is 1.11.2. Parameters input was quite strait-forward and it returned me a GeoTIFF image. You can choose the number of bite, format,... The code is also generated and you ...


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Good solutions, another solution to this problem and one that I would have used until I read these other posts would be to create two layers from the same shapefile. The first layer I would symbolize with the color you want to fill and no border outline, then I would set this layer to the transparency you required. The second layer would display all of ...



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