geog387_lab3

Geog387_lab3 - Geography 387 Fall 2011 Lab 3 Working with Attribute Data Lab 3 Working with Attribute Data 1.0 Overview In this lab you will

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Geography 387 – Fall 2011 Lab 3 Working with Attribute Data Lab 3: Working with Attribute Data 1.0 Overview In this lab you will strengthen your ArcGIS skills from previous labs and begin to work with attribute data. The overall steps of this lab are: Download GIS data from a public website Read the metadata for the data Define the correct projection for the data Create a geodatabase Import the data into that geodatabase. Look at the attributes Project the data Select features with queries Export selected features to the geodatabase Add fields and calculate values for them Create a map with classified color scheme (a choropleth or thematic map) Create a graph based on the attribute data
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Geography 387 – Fall 2011 Lab 3 Working with Attribute Data 2.0 Get the data Make a Lab 3 work folder in your workspace (on your USB drive or local drive). Then go to the following web site: http://nationalatlas.gov/
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Geography 387 – Fall 2011 Lab 3 Working with Attribute Data The webpage may look different than the screenshot above because the National Atlas is a dynamic site, which changes its "What's New" section regularly. Click on the "About" link below the search window at the top. Read through the description of the National Atlas and answer the following question. Question 1: (1) a. When was the first National Atlas published? b. Before this digital version of the National Atlas was released on the Internet, when was the last update to the National Atlas? You are now going to download a GIS layer from the National Atlas site. Click on the "Mapping Professionals" in the dark blue bar at the top right. Read the information about "Raw Data" and "Raw Data Documentation". Now answer the following question: Question 2: (2.5) a. What formats do Vector files come in? b. What format do geostatistical data (additional attributes) come in? c. What format do Raster image data come in? d. What standard was used to create the metadata? e. Does metadata come with the raw GIS data files? You are now ready to download the raw GIS data layer from this site. First click on "Raw Data" icon. You will see a list of chapters, such as: Agriculture, Biology, Boundaries, etc. These chapters are used to group raw data into sets. Go to the Boundaries chapter. Several GIS layers are available for download. Each layer occupies a row in the table. Locate the "County Boundaries, 2001" row in the table. Find the column that has the link to the download and right-click on the link to the compressed shapefile, select "Save link as. .." and navigate to your Lab 3 folder and save the download file there. This will download the shapefile in a compressed (Gzip) format. Note: if the National Atlas server does not respond, then just click
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This note was uploaded on 03/02/2012 for the course GEOG 387 taught by Professor Staff during the Fall '08 term at Sonoma.

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Geog387_lab3 - Geography 387 Fall 2011 Lab 3 Working with Attribute Data Lab 3 Working with Attribute Data 1.0 Overview In this lab you will

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