LasBoundary,

[Rohil Gupta]

 Do the shp files thus generated by this tool have any information of z coordinate of the polygon generated, I need to know the height of the building polygon also. If not, Can anyone tell how can I fetch the information of height of a building from the shape file generated by LASboundary

[Martin Isenburg]

Hello Rohil,

the z coordinates are stored to the generated Shapefile but it seems you are looking the wrong place. The z coordinates are *literally* stored in the *.shp file instead of as an attribute to the *.dbf file. The Shapefile uses Shapetype PolygonZ that has in addition to X, Y, and M and entry for Z. How to copy the Z values from the *.shp file to a new "elevation" or "Z" attribute in the *.dbf file is not something I have ever done. I found some page that seems to describe how to do this in QGIS / Spatialte / PostGIS but there are probably other ways too and I am sure also ArghGIS can do this.

http://faunaliagis.wordpress.com/2013/08/14/transfer-3d-shapefiles-z-values-to-the-table-of-attributes/

Regards,

Martin @rapidlasso

On Mon, Jun 27, 2016 at 1:39 PM, Rohil Gupta <rohi...@gmail.com> wrote:

 Do the shp files thus generated by this tool have any information of z coordinate of the polygon generated, I need to know the height of the building polygon also. If not, Can anyone tell how can I fetch the information of height of a building from the shape file generated by LASboundary

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[Volker Wichmann]

Hi,

we have simple tool in SAGA for this purpose: "Convert Vertex Type
(2D/3D)" -
http://www.saga-gis.org/saga_module_doc/2.2.7/shapes_tools_23.html

The conversion from 2D to 3D is lossless for all geometry types, but
converting 3D lines and polygons to 2D is not in case the vertices of a
geometry have different z-values - we can keep only one z-value as
attribute for the geometry.

Regards,
Volker

[Vítězslav Moudrý]

Hello Rohil,

ArghGIS way: http://desktop.arcgis.com/en/arcmap/10.3/manage-data/tables/calculating-area-length-and-other-geometric-properties.htm

Regards,

Vitek

>>> Martin Isenburg <martin....@gmail.com> 28.6.2016 17:17 >>>

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