Caitlin Dempsey
State Plane Coordinate System
If you’ve ever worked with GIS data regionally within the United States you’ve probably come across the State Plane Coordinate ...
Geography and Geology of the Galapagos Islands
The Galapagos archipelago is located about 1000 kilometers to the west of Ecuador in the Pacific Ocean. The Galapagos Islands ...
Clip Analysis using ArcGIS Desktop
The video tutorial below demonstrates how to use clip analysis using ArcGIS 9.2.
Caribbean Islands: the Lesser Antilles
Virgin Islands The Virgin Islands is an archipelago located in the northern part of the Lesser Antilles, in the Caribbean ...
UPS Mostly Right
Something you don't see very often is a UPS truck trying to make a left hand turn.
Volunteered Geography
Volunteered Geographic Information (VGI) represents a transformative approach to collecting and analyzing geographic data. This concept, rooted in the participatory ...
Creating Simple Maps with Microsoft Excel
Got MS Excel? Need a simple map? A little known tool in older versions of Microsoft's Excel is the ability to create simple maps from tabular data. You can create simple chloropeth, chart and dot density maps using data organized by country, state or region.
GPS 1 – Cabbies 0
The battle by New York taxi cab drivers to prevent the Taxi and Limousine Commission (TLC) from requiring them to ...
BASINS 4.0
BASINS 4.0 is an environmental modeling interface built upon the open source GIS MapWindow. The system contains tools to download ...
New York Taxi Drivers Strike Over GPS
UPDATE (From CNN): A group of taxi drivers launched a two-day strike Wednesday, right in the middle of the New ...
Basics of a Map
Learn about some basic design and concept elements when making a map.
First Impressions of the Esri User Conference
Both in their first year as full-time GIS professionals, Kristina Jacob and Marc Zuber attended their first ever Esri International User Conference this past June in San Diego, California.
Paleontology and GIS
Often, GIS is used to look at current trends and to predict future ones. GIS also has a use in ...
Blogging the 2007 ESRI User Conference
Check out bloggers' reviews of the 27th annual ESRI International User Conference to catch up or gain different perspectives on the event.
Geospatial Communities Back Court Decision in MAPPS Lawsuit
Last week, the U.S. District Court in Alexandria, Virginia, ruled against special interest groups that aimed to impose strict limitations ...
Paleomap Project
Created and compiled by Christopher Scotese, from the University of Texas at Arlington, Paleomap Project is a site that uses ...
Plaid Avenger’s World Geography Book
John Boyer created a comic-book style geography book.
OneGeology Project: Mapping the Planet
The "OneGeology Project," a global consortium of scientists and organizations, aims to map the entire planet's geology in an ambitious endeavor.
Neogeography
Neogeography means “new geography” and consists of a set of techniques and tools that fall outside the realm of traditional GIS, Geographic Information Systems.
New Perspectives on Urban Land Use Change
As Population Grows, So Do Urban Areas New Perspectives on Urban Land Use Change Over 300 million Americans have to live ...
Methods for Creating Spatial Databases
There are several ways in which to bring spatial data into a GIS. This article provides a brief overview of some of the more common methods for creating vector GIS data.
Fixing Segmentation Violations in ArcView 3.x
If you’ve tried to open an ArcView 3.x project (.apr) and gotten the “segmentation violation” error, it can be very ...
How to Label More Than One Field in ArcMap
You can easily label more than one field of a layer in ArcMap with Visual Basic script.
Orthophotos and GIS
Aerial photographs play an important role in GIS data acquisition and visualization. First, they help provide a solid visual effect. ...
Uses of GIS/GPS in the Space Shuttle Columbia Debris Recovery
On February 1st 2003, the Space Shuttle Columbia was destroyed upon re-entry to the earth’s atmosphere. During its re-entry into ...