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Thu Jul 31 16:35:10 2014

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3D DXF from MapInfo Tab or ESRI Shape (or anything) using OGR

Note:The following post requires gdal 1.8

A lot of times we need to send/use 3D dxf files, we used to use FME however FME is not free or cheap. So I went looking for a free solution.

If you have gdal 1.8 it’s just one simple command line run using, what is becoming my favorite GIS tool, ogr2ogr.

All you have to do is run:

ogr2ogr -f "DXF" {outFile} {inFile} -zfield {ColumnWithZValue}

So in my case I ran:

ogr2ogr -f "DXF" C:\Temp\contourswarwick.dxf C:\Temp\Contours.TAB -zfield Height

I haven’t fully tested it but {outfile} can be any file ogr supports.

and the output:

Top view of contours

Top view of contour layer

Contours side view

The side view of the above image.

In the words of, the not so great, Charlie Sheen. WINNING!

Happy mapping :D


Filed under: MapInfo, Open Source Tagged: 3D, ESRI, gdal, gis, mapinfo, mapping, ogr, Open Source, OSS

Speculations on the File Geodatabase API

At the ESRI Developer Summit there was news of the File Geodatabase (FGDB) API. Based on the tweets from the summit it appears:

  • The API will be C++ only
  • API works on Windows and Unix/Linux (specifically RedHat, Solaris, SuSE) operating systems
  • Rudimentary support only—features such as annotation, relationships, topologies, etc. are lacking

Since ESRI is releasing a targeted API and a not a specification, support for Mac OS X is out of the question.

How well open source GIS applications will be able to support the FGDB (if at all) remains to be seen.

The other question is: Will the API be made freely available or will it require an ArcGIS license?

Will the release of the FGDB API be the “Shapefile-killer”? I have my doubts…

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