Building Raster Geodatabases

Geography 414 homework assignment from the Raster database lecture.

Better Raster Clipping Options in ArcGIS

  1. http://blogs.esri.com/Dev/blogs/geodatabase/archive/2009/05/06/Better-Raster-Clipping-options-in-ArcGIS.aspx
  2. http://blogs.esri.com/Dev/blogs/geodatabase/archive/2009/05/14/Better-Raster-Clipping-Options-in-ArcGIS-_1320_-Part-B.aspx
  3. http://blogs.esri.com/Dev/blogs/geodatabase/archive/2009/08/07/Clipping-Rasters-_2D00_-Part-C-_2D00_-Reverse_2D00_Clipping-on-a-raster-_2800_aka-Masking_2900_.aspx

Raster Dataset Homework:

  • Get the census tract layer for Hamilton County, TN for TIGER 2010
  • Download the NLCD data from the assignments section of Blackboard
  • Create a raster layer of land cover for those areas that fall within Hamilton County EXCEPT for tracts
    • 6
    • 8
    • 10
    • 15
    • 31
  • Create ppt of screen shot and post on bb

My approach to this is to create a new shapefile that does not contain the census tracts to exclude.

SELECT * FROM tl_2-1-_47065_tract10 WHERE "TRACTCE10" = ‘000600’ OR "TRACTCE10" = ‘000800’ OR "TRACTCE10" = ‘003100’

I’m not sure why 10 and 15 were listed as tracts and will need to ask Dr. Ralston about that in class – perhaps I am looking at the wrong attributes.

In some metadata I found at http://datafinder.org/metadata/Census2010Tiger.html <TRACTCE10>, "TRACTCE10" is listed as "2010 Census census tract code"

Also, "NAME10" is defined as "2010 Census Tract Name" – this is the census tract code converted to an integer or integer plus two-digit decimal. Still, however, 10 and 15 were not listed as tracts when sorting by ascending in "NAME10" column in the preview in ArcCatalog.

I chose "Switch Selection" and then "Create Layer from Selected Features" to obtain a new layer, minus tracts 6, 8, and 31.

I then used Raster processing – Clip following the guide at <http://blogs.esri.com/esri/arcgis/2009/05/14/better-raster-clipping-options-in-arcgis-part-b/>.

I used <hamilton_nlcd> clipped previously as the input raster. The output raster is <tl_2010_47065_tract10 selection>.

As a final insult – ArcMap froze up on me – so my final product is faded out, but I took a screen capture with Print Screen.

hamilton_co_nlcd.pdf

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About Tanner Jessel

I am a recent M.S. in Information Science graduate from the University of Tennessee School of Information Science. I was formerly a graduate research assistant funded by DataONE (Data Observation Network for Earth). Prior, I worked for four years as a content lead and biodiversity scientist with the U.S. Geological Survey's Biodiversity Informatics Program. Building on my work experience in biodiversity and environmental informatics, my work with DataONE focused on exploring the nature of scientific collaborations necessary for scientific inquiry. I also conducted research concerning user experience and usability, and assisted in development of member nodes with an emphasis on spatial data and infrastructure. I assisted with research designed to understand sociocultural issues within collaborative research communities. Through August 1, 2014, I was based at the Center for Information and Communication Studies at the University of Tennessee School of Information Science in Knoxville, Tennessee.

Posted on November 27, 2013, in Coursework and tagged , , , , . Bookmark the permalink. Leave a comment.

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