[GIS] Calculating minimum/maximum width for overlay of two polygon strips in ArcGIS or some Opensource GIS

arcgis-10.1arcgis-desktopgeometryopen-source-gispolygon

Is there some solution for calculating minimum and maximum width for overlay of two polygon strips? When I clip these strips the result is another strip with variable width about 1 km and 20 km long. How can I get minimum and maximum width for the clipped strip in shorter axis? I try script from Calculating Polygon Width in ArcGIS Desktop? but it doesn´t suite with this issue.
Is there some solution for ArcGIS 10.1? example: clipped strip with red line for minimum width, blue for maximum
Or is it some solution solving the problem straightway without clipping inputs?

Best Answer

Supposidely this utility through QGIS can calculate MIN and MAX width for a polygon:

Azimuth-Width

It is designed to compute (for now) maximum or minimum width of the given polygon(s) in the given direction.

Related Solutions

[GIS] Get Raster Values from a Polygon Overlay in Opensource GIS Solutions

Use 'extract' to overlay polygon features from a SpatialPolygonsDataFrame (which can be read from a shapefile using maptools:readShapeSpatial) on a raster, then use 'table' to summarise. Example:

> c=raster("cumbria.tif") # this is my CORINE land use raster
> summary(spd)
Object of class SpatialPolygonsDataFrame
[...]
> nrow(spd)  # how many polygons:
[1] 2
> ovR = extract(c,spd)
> str(ovR)
List of 2
 $ : num [1:542] 26 26 26 26 26 26 26 26 26 26 ...
 $ : num [1:958] 18 18 18 18 18 18 18 18 18 18 ...

So my first polygon covers 542 pixels, and my second covers 958. I can summarise each of them:

> lapply(ovR,table)
[[1]]

 26  27 
287 255 

[[2]]

  2  11  18 
 67  99 792

So my first polygon is 287 pixels of class 26, and 255 pixels of class 27. Easy enough to sum and divide and multiply by 100 to get percentages.

Best Answer

Related Solutions

[GIS] Get Raster Values from a Polygon Overlay in Opensource GIS Solutions

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