Determining if a Polygon is drawn clockwise or counterclockwise

Posted by & filed under GIS, Technology.

According to the ESRI Shapefile Documentation, “The neighborhood to the right of an observer walking along the ring in vertex order is the inside of the polygon”.  Meaning that all normal or “clean” polygons are drawn in a clockwise fashion.  When it comes to holes in the polygons, these are defined by a counterclockwise path delineating… Read more »

Mapping the Earth’s Gravity

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Some places on earth have different gravities.  Gravity roughly decreases with altitude, and many things can affect it.  The linked article explains that the European Space Agency are trying to get a better image of the earth’s gravitational pull.  There is also some talk about how this study can help us understand climate models better…. Read more »

Microsoft Single View merging Business Data and Maps

Posted by & filed under America, GIS, Politics, Technology.

It looks like even Microsoft is picking up on the current momentum of Neogeography.  This product seems to be pretty similar to its already existing MapPoint software, which is targeted at marketing and business uses, as well as some low-end GIS uses.  Microsoft’s Single View Platform is targeted more to goverment applications.  Microsoft has partnered… Read more »

Scribd: A Great Place to Upload and Serve your PDFs

Posted by & filed under GIS, Technology.

Those of you who talk to me on a regular basis know that I love touting Scribd as the best new document sharing service.  They have a service called iPaper that lets you embed your documents anywhere. I love Scribd for sharing documents that would otherwise sit on my hard drive unused.  By serving up… Read more »