Tag: map projections
Exploring Map Projections
Created using D3, Map Projection Transitions provides an excellent way to visualize a wide range of map projections. The page was created by Jason Davies, a freelance data visualization consultant. Map projection visualizations offers the user a glimpse at what forty-one different projections look like. Users can select one of the map projections from the drop [...]
Free GIS Books
Building a collection of reference and academic texts on GIS can be costly. There are some free online source materials that can be a valuable contribution, especially if your book budget is nonexistent. Most of these free GIS books are available in downloadable PDF format and can be read from a computer or on an [...]
Best of GIS: Notable 2011 Geospatial Happenings
It’s been a very long time since I’ve done a “best of GIS” year end review. Listed below are some of what I have found to be the more exciting and sometimes just plain fun happenings and advances in the GIS and greater geospatial field for the year 2011 as culled from the archives [...]
Common Map Projections
Map projects are one of the fundamental concepts of geography and cartography. Selecting the right map projection is one of the important first considerations for accurate GIS analysis. The problem with projections (and the reason why there are so many types) is that it is very difficult to represent the curved 3D surface of the [...]
Map Projections and Coordinate Systems
What are Map Projections? The shape of the earth is roughly spherical wheres as maps are two dimensional. Map projection is a set of techniques designed to depict with reasonable accuracy the spherical earth in a two-dimensional (i.e. flat) media. Map projection types are created by an imaginary source of light projected inside the earth. [...]
