Monday, October 31, 2011

Passing Unicode strings between C# and C/C++ dynamic link libraries

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Passing simple data types like int, boolean, double between managed C# code and unmanaged C/C++ code is fairly straightforward. However, pas...
Monday, October 24, 2011

Decompose polygon vertices to points in Global Mapper

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In Global Mapper , you can decompose the vertices of selected polygons into standalone point features. The process is basically a two part p...
Monday, October 17, 2011

How to align the Facebook "like" button with Twitter and Google +1 buttons

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I recently added the Facebook , Twitter and Google Plus social network sharing buttons to a Google Mapplets web page. I found that while th...
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Monday, October 10, 2011

Set Coordinate Reference System for a grid file in SAGA GIS

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When an ESRI ArcGrid ASCII Grid file without an associated projection file (*.prj) is loaded into SAGA GIS , the grid data will be placed i...
Monday, October 3, 2011

Create polygon centroids in gvSIG

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It is possible to use gvSIG to create polygon centroids but this is done indirectly through the use of add-on functionality from the Sextant...
Monday, September 26, 2011

Create a thematic map with gvSIG

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Creating thematic maps based on one or more attribute fields of a geographical feature is a fairly typical GIS task. The free and open sourc...
Monday, September 19, 2011

Convert local date time to GPS week, seconds of week Google Gadget

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Note : A WebApp version of this Google Gadget is available at  https://dominoc925-pages.appspot.com/webapp/calc_timegps/ This Google G...