This chapter’s lab will introduce you to some of the basics of working with
georeferencing concepts by matching an unreferenced map image against a
referenced imagery source. You’ll be using the free Microsoft MapCruncher
utility for this exercise.
Important note: MapCruncher will take a map (in an image or PDF format) and align it to its Virtual Earth (and transform it into a Mercator projection). The end result of the process is a series of “tiles” used by Virtual Earth
to look at your map matched up with their data. As such, while you’ll be using
georeferencing concepts from the chapter, the end result will be that your
map is turned into a “mashup” that could later be used on a Web page.
Objectives
The goals for you to take away from this lab are:
a Familiarizing yourself with the MapCruncher operating environment.
a Analyzing the unreferenced image and the source for appropriate control
point locations.
a Performing a transformation on the unreferenced data.
a Evaluating the results of the procedure.
Obtaining Software
The current version of MapCruncher (3.2) is available for free download at
http://www.microsoft.com/maps/product/mapcruncher.aspx.
Important note: Software and online resources sometimes change fast.
This lab was designed with the most recently available version of the software at the time of writing. However, if the software or Websites have significantly changed between then and now, an updated version of this lab (using
the newest versions) is available online at http://www.whfreeman.com/
shellito1e.
Lab Data
Copy the Chapter 3 folder containing a PDF file (parkmap2010.pdf), which
is a map—with no spatial reference attached to it, it’s only a graphic—of the
Youngstown State University (YSU) campus. This map of YSU can also be
downloaded from the campus map Web page at http://web.ysu.edu/gen/
ysu/Directions_Maps__Tour_m107.html.
3.1 Geospatial Lab Application
Georeferencing an Image
64
georeferencing concepts by matching an unreferenced map image against a
referenced imagery source. You’ll be using the free Microsoft MapCruncher
utility for this exercise.
Important note: MapCruncher will take a map (in an image or PDF format) and align it to its Virtual Earth (and transform it into a Mercator projection). The end result of the process is a series of “tiles” used by Virtual Earth
to look at your map matched up with their data. As such, while you’ll be using
georeferencing concepts from the chapter, the end result will be that your
map is turned into a “mashup” that could later be used on a Web page.
Objectives
The goals for you to take away from this lab are:
a Familiarizing yourself with the MapCruncher operating environment.
a Analyzing the unreferenced image and the source for appropriate control
point locations.
a Performing a transformation on the unreferenced data.
a Evaluating the results of the procedure.
Obtaining Software
The current version of MapCruncher (3.2) is available for free download at
http://www.microsoft.com/maps/product/mapcruncher.aspx.
Important note: Software and online resources sometimes change fast.
This lab was designed with the most recently available version of the software at the time of writing. However, if the software or Websites have significantly changed between then and now, an updated version of this lab (using
the newest versions) is available online at http://www.whfreeman.com/
shellito1e.
Lab Data
Copy the Chapter 3 folder containing a PDF file (parkmap2010.pdf), which
is a map—with no spatial reference attached to it, it’s only a graphic—of the
Youngstown State University (YSU) campus. This map of YSU can also be
downloaded from the campus map Web page at http://web.ysu.edu/gen/
ysu/Directions_Maps__Tour_m107.html.
3.1 Geospatial Lab Application
Georeferencing an Image
64