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Turns out that while QGIS' Python console found shapely, contour didn't. QGIS is using its own version of Python (2.7.4) in QGIS directory\apps while my non-QGIS Python install - tailored to my non-QGIS work needs and !important - is 2.7.9 in C:\Python27. Shapely was installed into C:\Python27\Lib\site-packages but contour was blind to anything outside ...


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If you want to create 10 m contour interval, so you have to find a primary data ( Your DEM's data) which has spatial resolution 10 meter or smaller like InSAR. Your can't create an interval contour smaller then it's DEM resolution because when you generate the contour using ArcGIS, the algorithm will try to find the nearest neighborhood between spot height ...


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As a rule of thumb you generally do not want to set your contours to be any smaller than your cell sizes. There is no point in doing so because even if there were 3 different values across the 30m cell, it would all be averaged to the same. If you are using a 30m DEM the lowest contours you should use is 30m, as that preserves the accuracy of the data and ...


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With my experiences with LiDAR pointcloud data (.las) files and LAS Tools you can set your own resolution. First you will need to filter out anything that isn't ground or water to get an accurate DEM filter. From you can use the LAS Toolset to create a LAS Dataset (.lasd) and from there you can create a DEM raster by using the LAS2DEM tool. Here is where you ...



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