1 / 21

Geocoding Addresses

Geocoding Addresses. A Special Topic Presentation by Karen Harner March 20, 2003. What is geocoding?. Geocoding is defined as the process of creating geometric representations for descriptions of locations

xalvadora
Télécharger la présentation

Geocoding Addresses

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Geocoding Addresses A Special Topic Presentation by Karen Harner March 20, 2003

  2. What is geocoding? • Geocoding is defined as the process of creating geometric representations for descriptions of locations • In the case of address geocoding, one generally uses points to represent desired addresses

  3. The process of geocoding: • Standardizing the address • Searching for potential candidates • Scoring each candidate • Matching address to best candidate

  4. Standardizing the address • During this step the address is broken into components • For example: street number, street name, street type and street direction

  5. Searching for potential candidates • The geocoding service searches the reference data to find a feature with address components similar to your standardized address • Uses spelling sensitivity settings

  6. Scoring each candidate • The geocoding service assigns a value from 0 to 100 for each potential candidate • Each address component is considered in the scoring • The score will be lower if components are misspelled, incorrect or missing

  7. Matching address to best candidate • The geocoding service looks for the potential candidate with the highest score • If the score exceeds the minimum match score setting, then the service matches the address with that candidate

  8. Geocoding Service Settings • Spelling Sensitivity • Minimum Candidate Score • Minimum Match Score

  9. Rematching • If unhappy with initial results, one can modify settings and geocode the table of addresses again • Also, you can interactively rematch addresses

  10. An example • Using geocoding to produce points representing the addresses of various entertainment centers in Charlottesville

  11. The process • Choose Geocode Addresses under the Tools menu • Add a Geocoding Service using the Tiger road file • Browse to the desired table and click ok

  12. The process cont’d… • Since 5 unmatched, go back and match interactively

  13. The process cont’d… • Able to rematch 2 points • Still 3 unmatched for various reasons

  14. Uses of geocoding include: • Matching UFO sightings to zip code polygons • Combating Crime by finding areas of increased criminal activity • Mapping polling locations and analyzing neighborhood voting trends • Plotting sightings of endangered species and correlating to suitable habitat and legally protected areas • Farmers are mapping their fields' health and applying fertilizers and pesticides according to need

  15. Sources • Using ArcMap : GIS by ESRI / Michael Minami.

  16. Internet Resources • http://libraries.mit.edu/gis/teach/geocoding.html • http://artsandscience.concordia.ca/geog/arcgis/Geocoding_tutorial.pdf • http://gislounge.com/features/aa053100a.shtml

  17. Internet Resources Cont’d • http://www.cadenceweb.com:8080/features/casestudies/ppdgis.html • http://www.mitchellgeo.com/NEW_SITE/Pages_Site/geocorner.htm

More Related