Tuesday, November 24, 2009
Addresses that are not found using the MAR Web Services Sample Client and which are located
along a valid address range on a street have the option of being submitted for review by
knowledgeable address specialists.
Go to the MAR Sample Client and type in the address in question and click submit. If the address is within a valid street address range, and it is not in the MAR an option will appear entitled 'Select this link to report a New Location or to change an existing location,' Click on the link and carefully fill in the form. Click 'Submit for Verification'. A member of the MAR Data Team will research the address and respond within a couple of business days.
View Larger Map
Some of the street names in Google Maps are incorrect. I found a couple of cases in the large development called Capitol Gateway.
- There is no 17th Place SE here. It should be 57th Place SE
- On the crescent shaped street near where it says 'McWilliams Ballard' it should be 57th Street SE (not 57th Place SE).
Collaborative Mapping is important for the future of the Master Address Repository (MAR). The MAR allows collaboration when it comes to reporting missing addresses and residential units. In the future increased collaboration is the way to go.
P.S. Capital Gateway, themselves, also misplaced street names on their site plan.
Sunday, November 22, 2009
- The MAR has established a unified addressing standard. It allows the District Government to easily compare information about an address, block or intersection across databases and agencies.
- Addressing standards are built into the MAR.
- It has tools that allow for geocoding and information retrieval regarding addresses, intersections and blocks that enforce the standards.
- MAR simplifies crosscutting queries by address within the DC Government.
Thursday, November 19, 2009
There are thousands of faulty records, some missing quadrants, incorrect street names, incorrect address numbers, missing premise addresses and more.
For an example go to: Search Real Property Assessment Database
Type in Square '0185' and Lot '0828' and then click 'Search Now' You will find that the Premise address field is missing the quadrant designation (it should be NW).
Below is an example where the ITS has incorrect addresses for four properties along 1400 block of 19th Street SE. In the image below the Master Address Repository (MAR) addresses are the green dots and the ITS addresses are the blue dots. It is clear from the image that their is a discrepancy between the MAR and the ITS regarding the proper locations of the addresses. In this case the MAR is correct. This has been confirmed by using USPS and Google Street View.
The ITS is one of many sources for the MAR. Unfortunately, some of the address errors in the ITS have infiltrated their way into the MAR. In the past few years, most of these address errors have been removed from the MAR. Now it is time for ITS to clean up their data.
Tuesday, November 17, 2009
Collaborative mapping is important and there is much potential here. With regards to the MAR and collaborative mapping, the MAR Sample Client allow users to easily submit missing addresses or residential units. In the future the MAR will become more collaborative. This blog is meant as a way to reach out to users who are interested in collaborating with us or just learning more about the MAR.
Monday, November 16, 2009
It should be noted that a very small percentage of addresses are not assigned that way and are thus considered address anomalies (large pdf).
Friday, November 13, 2009
Tuesday, November 3, 2009
For more information about address applications please go to: DCRA Website
Monday, November 2, 2009
- Addresses: 141,827
- Residential Units: 188,776
- Aliases: 5,215
- Street Name Alias: 1,022
- Intersections: 16,382
- Block: 15,825
- Address / SSL Cross Reference Table: 235,456
- The block & intersection table were updated
- The MAR Frequently Asked Questions (FAQ) was expanded and reviewed. It is available on the MAR Website.
- Working with Office of Unified Communications to help improve their addresses and place names in their Computer Aided Dispatch (CAD) for 911 and 311