mapping weather

GIS Data

Climate reconstruction for 1911 based on a limited number of weather observations from ship log books.

Help Map Historical Weather From Ship Logs

May 8, 2013By Caitlin DempseyGIS Data

The Old Weather project is a crowdsourcing data gathering endeavor to understand and map historical weather variability.

Elements of a Map

Map elements such as the map frame, legend, and north arrow are parts of what create a map.

Learn GIS for Free

There are a few online options to learn GIS for free. Take advantage of resources that provide you access to free courses from some of the world’s best universities and institutions.

Open Source GIS and Freeware GIS Applications

An open source application by definition is software that you can freely access and modify the source code for. Open source projects typically are worked on by a community of volunteer programmers. Open source GIS programs are based on different base programming languages. Three main groups of open source GIS […]

What is GIS?

GIS is a technological field that incorporates geographical features with tabular data in order to map, analyze, and assess real-world problems. The key word to this technology is Geography – this means that some portion of the data is spatial.

Calculating Polygon Area in ArcMap

Here are the steps for calculating the area of a polygon using ArcGIS.