Public Lab Wiki documentation


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As part of the Grassroots Mapping Curriculum series.

MapKnitter: Registering the images together as a map

Background: Registering Images from MapMill in geographic space into a composite image map. Known as “orthorectification” or “georectification” to geographers, this step covers the process of figuring out where images can be placed on an existing map, and how they can be combined, or “stitched” together. You are likely to have many images of overlapping or identical areas, which is why Mapmill or some type of sorting is used to determine which source images to use from the original set. 

The manual process differs greatly from automation in this type of map making with a cartographer making the maps using their individual judgement and style. But the different approaches bot are similar in that they use some type of additional information to create the map from, and that they are bound to specific cartographic elements such as map scale and map projection.
 Using MapKnitter 
Visit to start a new Knitter map project, view existing knitter maps, or work on one in progress. 
Before you begin: Choose a unique map title Know the location of the area you are mapping place name US postal code latitude,longitude Cartographer name (optional) Map details content (optional)