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1

This is how I would do it: Convert your line to a raster (Polyline to Raster) Convert the raster to points (Raster to Point) Add Z value from the raster to the points (Extract Values to Points). A new field named RASTERVALU with the raster Z value is added. Turn the points into a feature layer and select the point with the minimum Z field value using for ...


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You could drape your geological polygons on the elevation surface you created to make them 3D. Two ways in 3D Analyst are Interpolate Shape and Add Surface Information. For an explanation of both see: http://resources.arcgis.com/en/help/main/10.1/index.html#//00q80000005m000000


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z factor is used for the conversion between Z unit and XY unit. So if your coordiante system is in meter and your height too, z factor is 1. (it would be different if you have feet and meters, or degrees and meter etc) For the plane height, all volume above (or below) this height will be measured. So in your case you will use 25 m


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If you want to calculate the volume above or below a given reference plane you do not have to create a reference plane data set. The reference plane is just the elevation (e.g. 250 meters) of the plane. In Surface Volume (3D Analyst) tool you have to specify this height as base_z parameter. EDIT: If you really want to create a reference plane data set you ...


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A new revision of the app is up on GitHub with the big endian byte swap issue dealt with. See: Read HGT Files R2. Thank you to @BradHards for pointing me in the right direction.


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From the comment discussion: There are a range of issues discussed in previous questions: How to extract elevation from .HGT file? Vertical Datum Conversion Utilities It is particularly important to note that HGT file format is a pretty raw format, essentially just 16 bit integer values. However reading those values as 16 bit integer values on many ...



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