December, 2011


GIS Software

GIS on the Mac

GIS on the Mac

There are a few software packages and configuration options for those Macintosh users that are interested in running GIS software on their computers.  One of the most popular options for running GIS softly directly on within the Macintosh OS environment is QGIS, known formally as Quantum GIS, a free and […]

GIS Learning

Best of GIS: Notable 2011 Geospatial Happenings

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 […]

GIS Career and Jobs

Sample Esri Technical Exam Questions

Sample Esri Technical Exam Questions

Esri is now offering sample questions for Esri’s ArcGIS Desktop Exams.  The sample questions are accessible from Esri’s Training page. The sample questions mimic the multiple choice style of Esri’s technical exams although don’t expect to find any of the sample questions on the real exams.  The areas covered in […]

GIS Learning

GIS Roundup: GML Parser, Faces of GIS, Where Should I Go On Holiday?

GIS Roundup: GML Parser, Faces of GIS, Where Should I Go On Holiday?

Francesco Cutruzzula has created LGML, a GML minimal parser in Java (licensed under LGPL).  LGML parses GML files in order to output as Postgis WKT/EWKT.  2D and 3D GIS data inputs are both handled but files can not be of mixed geometry.  Cutruzzula came up with this project after a need arose […]

GIS Data

Data Appeal: 3D Visualization of GIS Data

Data Appeal: 3D Visualization of GIS Data

DataAppeal is data visualization service that takes GIS data one step further with 3D visualizations.  The underlying premise of DataAppeal is the use of more artistic design to represent point geospatial data.  Instead of flat 2D layers, the data is symoblized using a 3D and animated data visualization tool (EarthAppealTM). […]

Maps and Cartography

Global Manhattan Grid System

Global Manhattan Grid System

The Commissioners’ Plan of 1811 set into motion the grid system of streets between 14th Street and Washington Heights in the Manhattan borough of New York City. The NY Times has an overlay that allows viewers to compare a georeferenced John Randel map from 1811 to the modern street layout of Manhattan. […]

GIS Learning

Transversal Mercator projection. Map center is at 0°E, 0°N. Left border is near 85°W, right border is near 85°E. Source: Lars H. Rohwedder.Transversal Mercator projection. Map center is at 0°E, 0°N. Left border is near 85°W, right border is near 85°E. Source: Lars H. Rohwedder.

Common Map Projections

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