ArcMap tutorials by GISTutorials: Creating a Seamless Raster Mosaic/ Basic Georeferencing/ Advanced Labeling

December 12th, 2011 by Sanjay Gangal

Creating a Seamless Raster Mosaic
This tutorial shows how to mosaic rasters and how to correct the seem errors using the raster calculator and the focalmean function. Seam errors occur when two rasters don’t intersect correctly.
This method has changed in ArcGIS 10. It has adopted a python syntax. Also you don’t assign rasters algebraically like in previous versions. Instead you set the output to a new raster (it will be obvious within the Raster Calculator). The new syntax would look like this:
Con(IsNull(“myraster”),FocalStatistics(“myraster”,NbrRectang­le(2,2),”MEAN”),”myraster”)

Basic Georeferencing
This tutorial shows how to take a screenshot from Google Maps and correctly place it in space. This allows you to digitize buildings, roads, etc. from it and have them be correctly spatially referenced.

Advanced Labeling in ArcMap
This tutorial shows how to use the Expression-based labeling features of ArcMap to turn attribute based labels into any text you want.