Mapping and Geographic Information Systems (GIS) : Spatial & Online Mapping Tools
What is Georeferencing?
Many GIS projects require georeferencing some raster data. Georeferencing is the process of assigning real-world coordinates to each pixel of the raster. Many times these coordinates are obtained by doing field surveys - collecting coordinates with a GPS device for few easily identifiable features in the image or map. In some cases, where you are looking to digitize scanned maps, you can obtain the coordinates from the markings on the map image itself. Using these sample coordinates or GCPs ( Ground Control Points ), the image is warped and made to fit within the chosen coordinate system
ArcMap Desktop Georeferencing Guide (ESRI)
David Rumsey Map Collection - Georeferencer
Georeferencer v4 is an improved and updated version of our prior Georeferencer v3. It allows you to overlay historic maps on modern maps or other historic maps. The overlaid maps reveal changes over time and enable map analysis and discovery.|
NYPL Map Warper
The NYPL Map Warper is a tool for digitally aligning ("rectifying") historical maps from the NYPL's collections to match today's precise maps. Visitors can browse already rectified maps or assist the NYPL by aligning a map. Play the video above to tour the site and learn how to rectify a map yourself.|
Online Mapping Tools
ArcGIS Online - UW-Madison Organizational Account
Use the enterprise login to use your NetID
ArcGIS Story Maps
Choose Enterprise Login to use your UW NetID. ArcGIS Organization URL is: uw-mad.maps.arcgis.com
ArcGIS StoryMaps helps you tell remarkable stories with custom maps that inform and inspire. A story can effect change, influence opinion, and create awareness—and maps are an integral part of storytelling. ArcGIS StoryMaps can give your narrative a stronger sense of place, illustrate spatial relationships, and add visual appeal and credibility to your ideas. Use our simple map maker to create custom maps to enhance your digital storytelling. Or add text, photos, and videos to your existing ArcGIS web maps and web scenes to create an interactive narrative that's easy to publish and share.
Story Maps Tutorial
Getting started with ArcGIS Story Maps, one step at a time.