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ArcGIS often throws a topoengine error when it runs out of memory while running in 32 bit mode and performing overlay operations. To get around that I either chop-up the job or use 64 bit geoprocessing with lots of RAM and Repair Geometry on all input features (create local copies first if you don't want to mess up your inputs with the repair).


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You were nearly there when you said clip a raster by a polygon. Essentially they're the same operation: you can clip your raster to the polygon and then mask the result to the values you require. This masked raster can then either be converted into a polygon or kept as a raster. Note, it may be easier if you convert your polygon to a raster first.


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This is how you can use raster calculator to find "safe area" (note: basic analysis) using ArcGIS 10.2. Load your DEM into ArcGIS Desktop [] Open Raster Calculator and enter the conditions that you want to find. In the example below, I want to find areas of elevation from the DEM that are equal to or greater than 186m (186 is the level that my flood ...


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I would try something like this assuming we're interested only in those geometries that lie inside of some other geometry - these are considered as higher valued. UPDATE polygons -- adjust geometry SET wkb_geometry = new_polygon FROM ( SELECT p1.id, -- take the difference of the geometries ST_Difference(p1.wkb_geometry, ...


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A single 1:1M map sheet can be reprojected and extracted with the following command: gdalwarp -t_srs WGS84 -te 144 -36 150 -32 -crop_to_cutline 76943_Aus t_gda94.ecw AustTopo250_SI55.tif This is dependent on an ecw driver being loaded. Thanks to @user30184 for the tip: GDAL tools does not have a ready made tool for cutting by map sheets. ...


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Split raster does this, even keeps polygon geometry it chops single raster into bits and uses polygon geometry. Output base name is updated by seq.number, as always it is a 'bad' numbering i.e. image1, image2 etc while it should be image01, image02 etc if number of polygons > 9 and < 100. Would be helpful with sorting by name. Apart from this - great ...


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I would use model builder for this. Use the feature iterator to cycle through each polygon and feed that into the clip raster tool. You would use in-line variable substitution to pass the polygon ID or unique name you used in the iterator to the output name of your new clipped raster. Here is the model: If you don't know anything about model builder, ...


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Oh, this is a DOS thing, not fusion... you want to use DIR /B to generate a list of just the file names (/b means brief). If you want the full paths use DIR /B/S - this will also search all sub directories. To get a list of just the las files in the current directory into a text file: DIR /B *.LAS > FileList.txt (the > means redirect the output ...


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One way to do this is using canvas. Here's a working solution: html2canvas This script allows you to take "screenshots" of webpages or parts of it, directly on the users browser. The screenshot is based on the DOM and as such may not be 100% accurate to the real representation as it does not make an actual screenshot, but builds the ...


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It looks like you have all the pieces selected where you want holes cut out. Why not use Data Export to create a new layer out of them and then delete them from the original (or a copy of the original) and then do an "Erase"? Once they are deleted from the original, you will no longer have the overlap. To Address your comment below: Do the Erase as I ...


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Use the raster calculator, set output extent and snap raster to the DEM in the tool environment, then use the land use raster layer as the expression. Easiest way to do that is to double click the land use raster layer in the layer list. The output will be a raster with the extent of the DEM with NoData where there are no the land use values.


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You can do this using the Raster Clip tool. You need to use the polygon dataset for the "Output Extent" parameter and then make sure that "Use Input Features for Clipping Geometry" is selected. This will fill the output dataset with the value you set for "NoData Value" for ever cell that is outside of the polygon boundaries.



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