geog387_lab4

geog387_lab4 - Geography 387 – Fall 2011 Lab 4...

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Unformatted text preview: Geography 387 – Fall 2011 Lab 4 Cartography and Classification 1 Lab 4: Cartography and Classification 1.0 Overview This lab will introduce you to two main concepts: 1) how to join an attribute table to the attribute table of an existing feature class, and 2) how to make choropleth maps using a variety of classification methods. We will continue with our counties feature class from Lab 3. We will then download year 2000 water use data from the National Atlas site and make a variety of maps for the conterminous United States. The overall steps of this lab are: Import existing GIS data into a new file geodatabase Compare fields in the original shapefile to fields in the geodatabase feature class Download water use statistics from National Atlas Read the metadata for the water use statistics Relate water use statistics to the county feature class Symbolize the counties with total water use Create a map of total daily water use with different classification schemes Create a map of annual ground water use per hectare Create a map showing a large aquifer along with annual ground water use per hectare Geography 387 – Fall 2011 Lab 4 Cartography and Classification 2 2.0 Import existing GIS data into a new file geodatabase Make a Lab 4 working folder in your workspace (on your USB drive or local drive). Open ArcMap and establish a folder connection to your workspace that contains your Lab 3 and Lab 4 working folders. In this exercise, we are going to create a new File Geodatabase and import a feature class of counties from the 48 conterminous states (and Washington, D.C.) from your Lab 3 geodatabase. In the Catalog window in ArcMap, right-click on your Lab 4 working folder and select “New” and then select “File Geodatabase”. Rename your new geodatabase Lab4_US_water_use.gdb Now we are going to import a feature class from your Lab 3 geodatabase into your Lab 4 geodatabase. Right-click on the Lab 4 geodatabase in the Catalog window and select Import, and then Feature Class (single). Note: if you wanted to import multiple shapefiles all at once, you could select Feature Class (multiple). Geography 387 – Fall 2011 Lab 4 Cartography and Classification 3 The Feature Class to Feature Class window opens. In the Input Features window, browse to and select your feature class of counties of the 48 conterminous states in the Albers projection from your Lab 3 geodatabase. Do not use the dissolved feature class. For Output Location, chose your Lab 4 geodatabase, and for Output Feature Class name, use county_48_albers . Click the Show Help button to open the help if it is not already open. Click anywhere in the "Field Map (optional)" section of the "Feature Class to Feature Class" window to display the help information for field import. Use the help to answer the following question: Question 1: (2) a. How could we change the field names that will be displayed in the output feature class? Hint: To answer this thoroughly, right-click on the various attribute names (e.g. To answer this thoroughly, right-click on the various attribute names (e....
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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_lab4 - Geography 387 – Fall 2011 Lab 4...

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