Archive For January, 2011

The Power of Projections

As a spatial professional, projections and geodesy have become second nature to me – often to a point that I take them for granted.  In many cases, the projection becomes like a font in a presentation – if you used Helvetica on page one, you had better use it on page two.  Generally, the consistency […]

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PostGIS Projection Project

PostGIS is a wonderful suite of tools, which really anchors the open source web mapping toolkit.  However, it doesn’t always integrate well with an ArcGIS desktop environment.  One obvious source of conflict relates to projections – most of ArcGIS’s projections are infinitesimally different than their real world counterparts.  As an example, consider the Washington North […]

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