Lab4 Blog

October 20, 2009

For this part of the lab I chose to use this projection.


Projection: Albers

False_Easting: 400000.000000

False_Northing: 0.000000

Central_Meridian: -84.000000

Standard_Parallel_1: 24.000000

Standard_Parallel_2: 31.500000

Latitude_Of_Origin: 24.000000

Linear Unit: Meter


Datum: D_North_American_1983.

The Florida central meridian is -81

This projection is good because it is especially for Florida.

This lab was somewhat difficult for me. I had a hard time inputting the data into ArcMap. My files had spaces in them. I had to go back and change all of my file names so they would not have any spaces in them. Other than that I had no other problems with this lab.

ArcGIS terms:

  • DBF/Dbase files
    • A database program whose file format has been adopted for the shapefile data model and tables in ArcGIS
  • Select by Attributes
    • To choose a subset of features or table objects based on the values in one or more attribute fields
  • Query
    • An operation to extract records from a database according to a specified set of criteria
  • Fields (in a table)
    • A single column of information in a data table
  • Records (in a table)
    • A row in a table containing one object
  • Attributes
    • Information about map features stored in columns of a table
  • Relational Database
    • A database that stores information in tables and constructs temporary relationships between them
  • Join function
    • The temporary combination of data from two tables based on a common attribute field or location
  • Monitor Fire
    • I am not sure about the answer. It is when the computer monitor catches on fire.
  • Calculate/Field Calculator
    • This helps you do calculation using different fields. We used this in the lab to figure out percent change between different years.

I found most of my answers out of my GIS book. “Mastering ArcGIS” by: Maribeth Price


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