Geocoding is the process of getting tabular

    data from a data source, comparing it to a
    geographic layer (like a ...
Create a table of addresses you want to match…




                             Access database




                      ...
Obtain a GIS Layer which has address information and fields to match to!




          Geodatabase

         File Geodatab...
Create an address locator in Arc Catalog…

                                            Right click on a folder and
       ...
Open ArcGIS and add the table…




             Attribute Table to be geocoded with an address


                    Right...
Add the Address Locator…
Set up the Address Locator
and geocoding options…

  Address table
      Is the table with addresses to be
    geocoded
  ...
Geocoding Options…


                     Spelling Sensitivity
                          Do you want Indian Bend and
     ...
OffSet Distances



  Businesses
      Average 175 feet
  Residential
     Average 55 feet
  Overall Average
     Average ...
Geocode those puppies…
Allows you to see why
Match interactively as               addresses are not matching
needed…                             ...
Map the geocoded data and understand it’s limitations…


        Data
 quality can
  be a huge
       issue
 with some
   ...
WHOAAA
    THAR!!!!
It’s time for a
     Break!
Fundamentalsof Crime Mapping Geocoding
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Fundamentalsof Crime Mapping Geocoding

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Fundamentals of crime mapping Geocoding

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Fundamentalsof Crime Mapping Geocoding

  1. 1. Geocoding is the process of getting tabular  data from a data source, comparing it to a geographic layer (like a shapefile) and then displaying the address matches in ArcGIS, at the location where the match was made
  2. 2. Create a table of addresses you want to match… Access database Excel Spreadsheet Comma Delimited File
  3. 3. Obtain a GIS Layer which has address information and fields to match to! Geodatabase File Geodatabase ArcGIS Shapefile
  4. 4. Create an address locator in Arc Catalog… Right click on a folder and choose NewAddress Locator, or use the ArcToolbox
  5. 5. Open ArcGIS and add the table… Attribute Table to be geocoded with an address Right click on table, and choose geocode addresses
  6. 6. Add the Address Locator…
  7. 7. Set up the Address Locator and geocoding options… Address table Is the table with addresses to be geocoded Street or Intersection and Zone The fields in the table to try and match Output Shapefile or Feature Class Where are you saving the new geocoded file to? Geocoding Options How accurate do you want the point to be?
  8. 8. Geocoding Options… Spelling Sensitivity Do you want Indian Bend and Indian School to match? Minimum candidate score What score does a recod match need to be to be considered a possible match? Minimum match score At what score do we want to match or not match and place the point at that location? Side offset How far away from the centerline do you want the point to be drawn? End Offset How far away from an intersection do you want the point drawn?
  9. 9. OffSet Distances Businesses Average 175 feet Residential Average 55 feet Overall Average Average 101 feet From center of roadway to front door
  10. 10. Geocode those puppies…
  11. 11. Allows you to see why Match interactively as addresses are not matching needed… and correct the problem Time Consuming – one at a time With this table there was no ZONE field
  12. 12. Map the geocoded data and understand it’s limitations… Data quality can be a huge issue with some data depending on the scale at which the data is displayed
  13. 13. WHOAAA THAR!!!! It’s time for a Break!

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