PortlandMaps


PortlandMaps Documentation
  Overview
  How to locate a Parcel by Address

Crime Information
  Overview
  How to use the Graphs
  Frequently Asked Questions
  Definition Of Terms





How to use PortlandMaps

PortlandMaps has been developed with ease-of-use in mind. PortlandMaps only requires a valid street address, intersection or address number to locate a parcel. Based on the results of your search PortlandMaps will return to you a listing of candidates that match your search criteria. You can browse the list and select the candidate of interest. PortlandMaps will return to you neatly formatted report with a wealth of assessment, property and map related information. It's that easy!




How to locate a Parcel by Address

Step 1.

Enter a valid street address, intersection or address number (example 1211 SW 5th Ave, or 1211 or Madison and 5th) and press Search

Sample Search Form




Step 2.

Select your parcel from the list candidates

Sample Search Results




Step 3.

View or Print the formatted reports and maps for the parcel you have selected. Use PortlandMaps.com - It's that easy!

PortlandMaps provides you with easy access to a wide variety of data for the Portland Metropolitan Area. These data sets include:
  • Assessor/Taxlot Information
  • Aerial Photography
  • Elevation
  • Schools
  • Parks
  • Zoning Maps*
  • Water/Sewer*
  • Natural Hazard
* Data available for Portland only








CrimeMapper provides you with easy access to a wide variety of information on the types and occurrences of Part 1 Crimes for the City of Portland. These crime types include:
  • Assault
  • Arson
  • Burglary
  • Larceny
  • Vehicle Theft
  • Robbery
  • Sexual Assault
  • Homicide




How to use the Graphs

The graph provides a dynamic way to sort and display crime information. This versatile tool allows for the reporting and analysis of crime based on location, crime type and other characteristics. The default graph displays the percentage of crime types occurring with in a given radius of the target location. By clicking on a specific bar within the graph, each crime type can be displayed by month, by day of the week or by time of day.





Frequently Asked Questions

What is the Crime Grid?

The crime grid is a randomly generated quarter mile grid that covers the City of Portland. The crime grid is the geographic unit used to aggregate and summarize occurrences of crime types within the City. Since multiple crimes may be reported to the same location, occurrence points may overlap and display an incomplete picture of the total number of crimes reported at that location. The crime grid is shaded to display the frequency of crime occurring within each grid. As the number of crimes increases within a grid, the color of the grid changes.

Many factors can influence meaningful comparisons between crime grids. For example large work force populations in certain areas (that is Downtown, Oldtown/Chinatown, Pearl, Northwest Industrial, and the Lloyd area) can distort crime rates for these areas. Other factors may also affect reported crime in some areas including organized neighborhood Block Watch Block Captain programs, targeted police enforcement, or proximity to commercial and commuter zones.

Note: The Sexual Assault selection will only summarize and display crimes within a grid. Sexual Assault crimes cannot be displayed by occurrence points.

For additional information about crime in your neighborhood, for more information about the block captain program, please visit
Office of Neighborhood Involvement.

How are times and dates recorded for crime events?

Every attempt is made to pinpoint the exact time date and time a crime occurred. For some crime types (Assault, Robbery etc.) there are victims or witnesses present to confirm the time the crime occurred. However, for other types of crimes (Larceny, Auto Theft) victims or witnesses may not be present during the crime. For example if a individual parks their car on Friday at 6:00 p.m. but does not notice that the car has been stolen until Saturday at 10:00 a.m., the recorded times for the car theft would be starting at Friday at 6:00 p.m. and ending at Saturday at 10:00 a.m. If the record dates and times fall within a three hour span or within the overnight category, CrimeMapper will include those crimes in the appropriate graph time block or overnight category. The overnight category includes crimes that have a record range between 6 p.m. to 8 a.m.

What are types of crimes are mapped?

Currently all eight Part 1 Crimes are mapped: Assault, Arson, Burglary, Larceny, Vehicle Theft, Robbery, Sexual Assault and Homicide.

What Period of Time Does the Crime Database Include?

The police database used for CrimeMapper contains twelve months of Part 1 Crimes reported to the Portland Police Bureau. Reported offenses which, upon investigation, are unfounded, false or baseless are not included.

How often will the Crime Database be Updated?

The crime database will be updated every month. As each new month is added to the system, the oldest month will be removed. Updates will generally occur during the third week of each month.

Will Someone be able to Determine a Victim's Name or Address?

The database has been created especially for CrimeMapper from data recorded in the Portland Police Bureau Data System (PPDS.) Victim names and exact address information for crime occurrences have been removed.





Definition of Terms

Crime Grid - The crime grid is a randomly generated quarter mile grid that covers the City of Portland. The crime grid is the geographic unit used to aggregate and display occurrences of crime types within the City of Portland. Each grid is shaded to display the frequency of crime within the grid.

Part 1 Crime Types:

Assault - An attack by one person upon another for the purpose of inflicting severe injury. This type of assault usually is accompanied by the use of a weapon or by means likely to produce death or injury.

Arson - Any willful burning or attempt to burn a building, motor vehicle, aircraft, or personal property of another.

Burglary - The unlawful entry of a structure (both residential and non-residential) with intent to commit a theft.

Larceny - The unlawful taking of property from the possession of another; includes pickpocket, pursesnatch, shoplift, bike theft, and theft from motor vehicle (car prowl).

Vehicle Theft - The theft or attempted theft of a motor vehicle; includes motorcycles.

Robbery - The taking or attempting to take anything of value from a person or persons by force or threat of force.

Sexual Assault - Includes rape, statutory rape, and sodomy. (Does not include prostitution). Attempts to commit such assaults by force or threat of force are included. This definition is broader than the FBI Part 1 definition.

Homicide - The willful (non-negligent) killing of one human being by another.




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