Flex Projector is a free and open source, platform agnostic software application that lets users upload GIS data and create customized small scale global map projections.
Learn about the Mercator map projection – one of the most widely used and recently, most largely criticized projections. Amanda Briney takes a look at the history and development of the Mercator projection, how it works and some criticisms of the projection. The Mercator projection is just one of many map projections but it is one of the most recognizable.
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 […]
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 […]
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 […]
Selecting the right map projection is one of the important first considerations for accurate GIS analysis. Reviewed here are the Robinson, Transverse Mercator, Lambert Conformal Conic, and Space Oblique Mercator projections
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 […]
The USGS has posted a scanned file of John P. Snyder’s 1987 “Map Projections: A Working Manual” online in PDF and DjVu format. The beginning of the book contains substantial introductory information about map projection families and distortions. Each projection is started with a useful summary of the context and […]
A map projection is one of many methods used to represent the 3-dimensional surface of the earth or other round body on a 2-dimensional plane in cartography (mapmaking). This process is typically, but not necessarily, a mathematical procedure (some methods are graphically based). Creation of a Map Projection The creation […]