Tuesday, December 28, 2010

Field Research From December

Alley building in the Capitol Hill Neighborhood

Alley building in the Capitol Hill Neighborhood 2

Rear address: 318 REAR 3RD STREET NE  




A collapsed historic structure in the Capitol Hill Neighborhood

Field Research Printout

Rear Address: 327 REAR L STREET NE (in alley)

Rear Building without / unknown address in Petworth neighborhood

Tuesday, December 21, 2010

DC's Population Reaches 601,723

The US Census Bureau just released the 2010 official population counts.  DC had a count of 601,723 which is an increase of 5.2% from 2000.  This is the first decade of population growth in 6 decades.

Data from the Master Address Repository (MAR) was instrumental in raising DC's population count.   Using the MAR the MAR Data Team was able to add over 17,000 addresses (primary & secondary) to the Census' Master Address File (MAF).  This definitely contributed to a higher population count.  More information can be found in the LUCA Report.

Thursday, December 16, 2010

1/2 Address - In Capitol Hill Neighborhood

613 1/2 Address

Interesting Article About DC Population by Ward & Redistricting

Interesting Article About DC Population by Ward & Redistricting.  The MAR will be an important part of DC's redistricting effort as it will help determine how many housing units are each block.

Tuesday, December 14, 2010

What about addresses located in alleys?

Almost every address which is located in an alley is are already in the MAR. DC GIS has spent a significant amount of time tracking down these addresses. The majority of these addresses have been visited by DC GIS personnel. It is especially important that these addresses are properly in the MAR as they are often difficult to locate. Examples include: Groff Court, Gessford Court, Linden Court.

Wednesday, December 8, 2010

Moving An Address


The address 1455 Church Street NW was in a wrong location as it was in an incorrect building footprint  (blue lines) and incorrect property lot (red lines).   The address was moved to the correct location (see the top image which shows the move (yellow arrow)).    Now the address is located in the correct building footprint and the property lot.  The address was moved less than 10 feet.   Now the address is associated with the correct property lot (Square, Suffix, Lot).

Wednesday, December 1, 2010

***MAR Monthly Report: November 2010***

MAR Data Loads for November 2010












Dataset Numbers (as of December 1st, 2010):

  • Addresses: 142,018
  • Residential Units: 205,711
  • Aliases: 5,749
  • Street Name Aliases: 1,055
  • Intersections: 17,714
  • Blocks: 15,841
  • Address / SSL Cross Reference: 234,897

----------------------------------------------


News:

  • Updated the MAR Address Anomalies Report. Posted on the MAR Website.
  • Updated the MAR Presentation. Posted on theMAR Website.
  • Finished processing primary non matched addresses from US Postal Service. This resulted in dozens of corrections to the MAR.
  • Working on classifying address by residential status.
  • Updated University building names.
  • Worked on resolving the Address Number Suffix vs. Unit issue by converting hundreds of address number suffixes into units.
  • The MAR Blog can be visited at http://dcaddresscoordinates.blogspot.com/ .

Wednesday, November 24, 2010

Questions Regarding the Residential Units



What is the Residential Unit Table?

The residential unit table contains unit values and other related information regarding residential units. There are estimated 204,000 to 210,000 residential units (with a secondary address).  Each residential unit is associated with an address from the address table (via the ADDRESS_ID field). Example unit values include '101', '201', 'A', '910', '1', '6' and 'A2.' This data includes both rental and condo units which is noted in the 'UNIT_TYPE' field. For condo units the condo's SSL values and condo book and page number is also stored.


What are some of the challenges while creating the Residential Unit Table?


The biggest challenge is just dealing with acquiring the the huge quantity of residential units which is estimated at 204,000 to 210,000. Another challenge is matching the residential unit information with condo units from Office of Tax & Revenue's ITS Public Extract table. Unfortunately, in the ITS Public Extract table there is a tremendous amount of incomplete and incorrect data. This is especially true when it comes to the premise address and unit number columns.

What are the remaining weaknesses in the Residential Unit Table?

• Special use residential facilities (University Dorms, Group Homes, Retirement, Nursing Home and Military Barracks)
• Multi unit row houses
• Large buildings with a low occupancy rate
• Buildings which were constructed very recently

Wednesday, November 17, 2010

Address Fail!


Address Fail!  Where is the digit 4? (from Google Maps StreetView)
 (Click on image for larger version)


Friday, November 12, 2010

Door Removed - Address Retired

In the past there was a door here (red circle). 


The yellow building previously had two housing occupancies and two addresses.  Now, the yellow building has only one occupancy and one address.  The address which represented the occupancy where the door was has now been given a status of 'RETIRE' in the MAR.    If one looks really closely at the image (click on it) then one can see the outline of where the door had been.    Notice that the neighboring buildings both have two doors and the same placement of windows on the second floor.  
 
Just like our dynamic city, our addresses are also dynamic!

Thursday, November 4, 2010

MAR Monthly Report: October 2010











Dataset Numbers (as of Nov 1st, 2010):

  • Addresses: 142,534
  • Residential Units: 205,321
  • Aliases: 5,697
  • Street Name Aliases: 1,055
  • Intersections: 17,714
  • Blocks: 15,841
  • Address / SSL Cross Reference: 235,514


MAR News:

  • Dorms added as Residential Units on Georgetown University, American University and Wesley Theological Seminary
  • Added new field called ACTIVE_RES_UNIT_COUNT to MAR. This field will show the number of active residential units at each address that are in the residential unit table in the MAR. Now, it is very easy to the AddressPt and select all addresses which have more than 100 apartments.
  • New Condos Records from OwnerPt
  • Updated Marinas in Alias Names
  • Updated Hospital Names
  • Activated over a hundred 'ASSIGNED' or 'TEMPORARY' addresses based on new Google Maps imagery.
  • Continuing to go through the No Match addresses from the County Project with USPS


******* Address Number Suffix vs. Residential Unit Policy Changes *******

There has been ongoing confusion related to the question of what is considered an Address Number Suffix (ANS) and what is considered a Residential Unit (Unit) in Washington, DC. In terms of formatting, an ANS designation would be located between the address number and the street name (example: 302 A 14th Street NE) whereas a Unit would be located after the quadrant designation (example: 302 14th Street NE #A). Currently, there is inconsistency in the Master Address Repository’s (MAR) address database regarding the use of the ANS versus a Unit. After reviewing the United State Postal Service’s established addressing formats and consulting with Department of Consumer and Regulatory Affairs (DCRA), it has been determined that hundreds of these ANS should be considered residential units. By changing these address number suffixes into residential units, the MAR will better reflect reality. These changes will also improve address geocoding.

Going forward here is the policy:

  • All '1/2' designations will be considered as address number suffixes
  • 'REAR' designations which are a separate building will be considered as address number suffixes. 'REAR' designations which are in the same building as the primary non 'REAR' address will be considered units.
  • All letter designations which are not on a separate property and represent one occupancy will be considered units (except for military addresses).
Therefore, over the next month hundreds of addresses which have address number suffixes will be transformed into residential units. These address number suffixes will be deleted from the address table; in their place will be residential units.

The MAR Data Team will be storing a table of those addresses which will be deleted. This table can be used to convert address number suffixes into units or addresses. This will affect about 0.5% of addresses in the MAR.

Monday, October 18, 2010

Nicely Posted Addresses in Washington, DC

Nicely Posted Addresses in Washington, DC
(as seen in Google Maps StreetView)

MAR Web Services



The MAR includes web services which are a part of a large range of geographic web services offered by DC GIS.

For example by using the findDCInterThrouString operation one can find and have returned the intersection of 'ALABAMA AVENUE SE AND 36TH STREET SE'.    This operation " Accepts one concatenated DC intersection string containing two street names separated by ' And ', ' & ', ' @ ', 'BELOW', 'ABOVE', 'UNDER', 'OVER'. "    XML information is returnedd.

There are almost twenty operations that use the MAR.    These MAR Web Services are very useful for application developers using address, block, intersection or place name related data related in Washington, DC.

Thursday, October 7, 2010

Really Large Residential Buildings in Washington, DC

Locations of Residential Buildings which have 100 or more Units
This data comes from DC Governments' Master Address Repository
[please note that there are a small number of buildings missing]

Tuesday, October 5, 2010

Residential Units That No Longer Exist Will become 'RETIRE'

Residential Units which no longer exist (demolished or converted to another unit number) will be maintained in the Residential Unit Table.   There status will be 'RETIRE.'     As of this posting there are 778 residential units whose status is 'RETIRE'.  [In the past the policy was to delete these records from the Residential Unit Table].

P.S.   Residential Units that currently exist will have their status as 'ACTIVE'.

Monday, October 4, 2010

MAR Monthly Report: September 2010









Dataset Numbers:

• Addresses: 142,575
• Residential Units: 201,109
• Aliases: 5,662
• Street Name Aliases: 1,055
• Intersections: 17,714
• Blocks: 15,830
• Address / SSL Cross Reference: 235,913

--------------------------------------------------

MAR News:

• Alias names for the DC Public School Names were updated.
• Alias names for Marinas were updated
• Reviewed USPS County Project data for inclusion in the MAR.
• The number of Residential Units hit the 200,000 mark.
• Working on adding additional dorm rooms as Residential Units.

Tuesday, September 21, 2010

Old Survey Map


Old Survey Map Showing Areas:  Between Florida Avenue NE & New York Avenue NE around 4th & 5th Street NE


Wednesday, September 15, 2010

How many addresses are there in DC?

There are about 142,000 primary addresses (does not include unit values) in Washington, DC. There are estimated 200,000 to 207,000 residential units (with a secondary address designation (condos & apartments).

Sunday, September 5, 2010

Chancellor's Row At Brookland Metro - Phase I Digitized


New addresses for Chancellor's Row At Brookland Metro - Phase I were digitized (added) to the MAR last week.    In total, 100 address were added which represent these new rowhouses. 

MAR Monthly Report: August 2010

August 2010 Data Loads:





Dataset Numbers:

• Addresses: 142,427
• Residential Units: 199,672
• Aliases: 5,590
• Street Name Aliases: 1,055
• Intersections: 17,714
• Blocks: 15,830
• Address / SSL Cross Reference: 235,969

-----------------------------------------------------------------------------------

News:

• The 'RECCOMENDED' STATUS in the MAR Address Records has been removed. The ‘RECOMMENDED’ status for addresses in the MAR is obsolete. This is because DC GIS no longer sends over an employee to DCRA to recommend addresses. A DCRA employee has taken over this function and when the employee assigns (approves) an address, it will be entered into the MAR with a status of 'ASSIGNED''

• Thousands of Residential Units (apartment numbers) have been added to the MAR. Most of this data came via a shared project with the Postal Service called the County Project. It is estimated that the Residential Unit table now contains about 97% of all secondary residential addresses in DC.

• Post Office locations have been updated in the MAR.

Tuesday, August 24, 2010

Old Map of Georgetown from 1895

Old Map of Georgetown from 1895


The above map shows street name changes.  This map was used to confirm street names for the Master Address Repository.  

Tuesday, August 17, 2010

Danish report on social and economic benefits on the use of address data

A new report out shows the economic benefits of having address data openly available as is done in Denmark.

Monday, August 16, 2010

‘RECOMMENDED’ Status for Addresses has been Removed

The ‘RECOMMENDED’ status for addresses in the MAR is no longer needed.  This is because DC GIS no longer sends over an employee to DCRA to recommend addresses.  A DCRA employee has taken over this function and when the employee assigns (approves) an address, it will be entered into the MAR with a status of 'ASSIGNED''  

A few days ago there were 28 addresses which have the ‘RECOMMENDED’ status.   All these addresses had their status' changed to either a ‘TEMPORARY’ or ‘ACTIVE’ or ‘ASSIGNED’ or ‘RETIRE’.  Also, going forward an address will not be given the  ‘RECCOMENDED’ status. The advantage of this is that it would reflect the new reality and also simplify the choices of status values in the MAR.

Changes made to the MAR:

• 28 Addresses whose status was‘RECOMMENDED’ were changed to status's of  ‘TEMPORARY’ or ‘ACTIVE’ or ‘ASSIGNED’ or ‘RETIRE’

• Addresses will no longer be given = ‘RECOMMENDED’ status (through either batch load mode or MAR Maintenance Tool)

• MAR Documentation has changed.

Thursday, August 5, 2010

Horse Stable Road NW

Horse Stable Road NW located off of Oregon Avenue NW is a National Park Service Road

Monday, August 2, 2010

MAR Monthly Report: July 2010

July 2010 Data Loads:









--------------------------------------------------

Dataset Numbers:

  • Addresses: 142,275
  • Residential Units: 195,963
  • Aliases: 5,449
  • Street Name Aliases: 1,055
  • Intersections: 17,714
  • Blocks: 15,830
  • Address / SSL Cross Reference: 234,420

--------------------------------------------------

MAR News:

  • Began categorizing the alias names
  • Updated Embassy Information
  • Updated Block information
  • Added Hotel, Motel and Bed & Breakfast locations as alias names
  • Taught DC Geography Course to 911 Call Takers & Dispatchers

Thursday, July 29, 2010

Is it in Northeast, or Northwest?

Is is Northeast or Northwest? (The DC Curmudgeon Blog).

The quadrant component is a critical component for addresses in Washington, DC.

Wednesday, July 21, 2010

W Street NW vs. W Place NW


This issues is between 37th Street NW and Tunlaw Road NW. My coworker and I went to the DC Surveyor's Office and found out that is should be W Place NW. Google Maps has this street segment as W Street NW. The above image shows my 'Report a Problem' report to Google Maps.

Wednesday, July 14, 2010

Why is there no 'J' Street in Washington, DC?

Here is an interesting article from Snopes.com explaining why there is no 'J' Street in DC. There is a 'Jay' Street NE though. Why then is there no X,Y, or Z streets?

Thursday, July 8, 2010

Categorizing Place Names in the MAR

There are over 5,000 place names (alias names) in the MAR. Currently, these place names are uncategorized. Soon they will be categorized into such categories as:

  • APARTMENT BUILDING
  • BRIDGE
  • CONDO BUILDING
  • FIRE STATION
  • POLICE STATION
  • PUBLIC SCHOOL
  • HOTEL
  • RECREATION CENTER
  • MILITARY
  • HOSPITAL
  • UNIVERSITY
  • EMBASSY
  • etc.

The categorization of the place names will allow for one place name to be categorized in multiple categories. For example 'GEORGETOWN UNIVERSITY HOTEL & CONFERENCE CENTER' will be categorized into UNIVERSITY and HOTEL.

The benefits of categorizing the place names is two fold:

  • Allows MAR users to easily search a category of place names. (Before finding all hotel place names would be difficult as some hotels do NOT have the word HOTEL in their names such as 'GEORGETWON SUITES' or 'RIVER INN'
  • Allows the MAR Data Team to more easily keep the place names up to date as all place names in the same category can be update on a regular cycle.

Thursday, July 1, 2010

MAR Monthly Report: June 2010

June 2010 Data Loads:









--------------------

Dataset Numbers:


  • Addresses: 142,267
  • Residential Units: 193,470
  • Aliases: 5,449
  • Street Name Aliases: 1,055
  • Intersections: 17,714
  • Blocks: 15,856
  • Address / SSL Cross Reference: 234,553

MAR News:


  • A major update of intersection records has been completed. A large number of missing intersection records were added.
  • A large number of Hotel,Motels, Bed & Breakfasts have been added to the MAR alias name table. An example includes: MT. VERNON SQUARE BED & BREAKFAST located at 400 M Street NW.
  • Recreation Centers have been updated.
  • Embassy information has been updated

Recent Updates to MAR

Recently there have been a few updates to the MAR in the following categories:
  • Embassy
  • Hotel,Motels, & Bred & Breakfasts
  • Recreation Centers
  • Intersections

Monday, June 21, 2010

New MAR Batch Geocoder Available for Download


The District of Columbia GIS program is releasing a new version of the MAR Batch Geocoder. The new version will allow users to geocode a spreadsheet from Microsoft Excel in lieu of Microsoft Access database tables*. Users can also individually select fields, from the Master Address Repository (MAR), to include in their geocoded results. Find out more by visiting the Master Address Repository Website and clicking Download and Install the MAR Batch Geocoder (.zip).

Geocoding is the process of assigning a location, in the form of coordinate values, to an address. This is done by comparing the descriptive location elements in the address (street name, number, etc.) to those present in the MAR. The MAR is a database of every address in the District of Columbia stored as a point.

*Please uninstall previous versions of the tool by navigating to Start →Programs → MAR Batch Geocoder → Uninstall MAR Batch Geocoder. Users may still continue to use Microsoft Access databases to geocode.

Wednesday, June 9, 2010

Field Research On Tuesday


My coworker and traveled to the field yesterday to make some ground observations. Among the locations we travelled to were:


  • Henson Ridge Phase II: Found and reported an incorrect street sign there (Robinson Street SE), activated addresses of under construction or newly constructed townhouses, and check on the status of 3233 15th Place SE.
  • Asheford Court: No new construction in many months
  • 4th Street Vistas: Some new construction since last visit. No construction workers on site.
  • A new townhouse in Anacostia
  • 5135 F Street SE - no construction there
  • Woodson Heights: No new construction in many months.
  • The Renee Condominiums
  • L Street SE & 8th Street SE
  • 2nd Street NE & G Street NE: Many demolished rownhouses here. These addresses were retired in the MAR.

The weather was lovely and based on the field research dozens of changes were made to the MAR.

Tuesday, June 1, 2010

MAR Monthly Report: May 2010

May 2010 Data Loads:




Dataset Numbers:
  • Addresses: 142,179
  • Residential Units: 193,664
  • Aliases: 5,378
  • Street Name Aliases: 1,055
  • Intersections: 16,740
  • Blocks: 15,856
  • Address / SSL Cross Reference: 23,4317
MAR News:

  • A large number of residential units have been added, updated or deleted. Most of these are due to the processing of the most recent Condo Relate table
  • A new program which will automate most of the process to update intersections in almost complete.
  • Work continues on adding intersections for ramps (example: IRVING STREET NE EASTBOUND AND RAMP FROM NORTH CAPITOL STREET NE NORTHBOUND)



Monday, May 17, 2010

Spelling of Street Name in NE: Kearny vs. Kearney


An issue came up regarding how to spell a certain street name in the NE quadrant in Washington, DC. The issue was was whether it should be Kearny or Kearney.

The sources that have Kearny (as of May 2010):
  • Master Address Repository
  • DC Department of transportation
  • Street Signs on the Street

Sources that have Kearney (as of May 2010):

  • United States Postal Service (USPS)
  • Google Maps

The issue was resolved by researching the correct spelling of the name at the DC Office of the Surveyor. Working with staff at the Office of the Surveyor, it was found that the correct spelling is Kearny. This was confirmed by eventually finding an official surveyor's map dating from 1898 which showed Kearny. It was located in Washington County book 18 page 18a.

After the research was completed. Both Google maps and the USPS were contacted to inform them that the proper spelling of the street is Kearny.


Monday, May 3, 2010

MAR Monthly Report: April 2010

MAR Monthly Data Loads:









Dataset Numbers:


  • Addresses: 142,121
  • Residential Units: 193,750
  • Aliases: 5,376
  • Street Name Aliases: 1,055
  • Intersections: 16,740
  • Blocks: 15,856
  • Address / SSL Cross Reference: 233,875



---------------------------------------------------------

MAR News:




  • The Master Address Repository Frequently Asked Questions (FAQ) has been updated.

  • The addresses for a new medium sized residential development have been added to the MAR. The development is centered at Sheridan Road SE & Bowen Road SE.

  • About a dozen alias names (place names) have been added for small parks. This includes HANCOCK PARK which is located at the corner of C Street SW and 7th Street SW.

Thursday, April 29, 2010

Development Coming to St Paul's College

Development Coming to St Paul's College (yellow area)
Over 200 townhouses are planned for the eastern part of St. Paul's College. Two new street names are planned: Regents Place and Chancellor's Way.

Monday, April 12, 2010

MAR Addresses on OpenAddresses.org

DC Addresses on OpenAddresses.org
(see the big red blob)


The MAR addresses have been uploaded to the Openaddress.org. DC GIS staff contacted OpenAddresses.org and informed them about our MAR address data set. Shortly thereafter, they successfully uploaded our addresses (see big red blob on the above image).
OpenAddresses describes itself "as an Open Source web portal for the management of Open worldwide geolocated postal addresses. " Also see the NSGIC News Blog about OpenAddressses.org.
The benefits of having DC addresses on the OpenAddresses.org website are:
  • Joining and making our data available to the global community as part of OpenAddresses.org's efforts to make worldwide address data readily accessible.
  • To receive feedback on our address data quality

Thursday, April 8, 2010

17 DC VILLAGE LANE SW

17 DC VILLAGE LANE SW (construction site)

Recent Changes




  • The address 4225 CONNECTICUT AVENUE NW has been retired as the gas station on the southeast corner of Connecticut Avenue NW and Veazey Street NW has been demoslished.

  • A new address at 1534 O STREET NW has been added.

  • A new address at 1514 REAR P STREET NW has been added.

Thursday, April 1, 2010

MAR Monthly Report: March 2010


Dataset Numbers:

  • Addresses: 142,048
  • Residential Units: 193,570
  • Aliases: 5,343
  • Street Name Aliases: 1,055
  • Intersections: 16,740
  • Blocks: 15,856
  • Address / SSL Cross Reference: 233,629

News:

Wednesday, March 24, 2010

1/2 Address - Not very visible


The 1/2 component of the address is obscured by the dirt
( Taken during field research today)

Underpasses & Overpasses - Added to MAR

Underpasses & overpasses have been added to the MAR Intersection Table. There were 349 overpass and underpass records which wered added. There are distinguished from regular intersections which are 'at grade.' These underpasses & overpasses are not at grade.


Examples include:
  • 16TH STREET NW OVER MILITARY ROAD NW
  • MILTARY ROAD NW UNDER 16TH STREET NW
  • INTERSTATE 395 SOUTHBOUND UNDER D STREET NW
  • SUITLAND PARKWAY SE UNDER INTERSTATE 295

One can find these intersections using the MAR Sample Client.






View Larger Map

Monday, March 15, 2010

Traffic Circles

Barney Circle - in SE


Additional traffic circles have been added to the MAR. Their locations can be found by going to the MAR Sample Client and typing in their respective names.

One of the sources for this information was from Wikipedia. In the Wikipedia article it mentions an Ellicott Circle. Ellicott Circle does not currently exist. It did exist decades ago (see below Baist Index image transposed over 2009 Imagery)


Ellicott Circle SE (from Baist Index) Transposed over 2009 Imagery

Sunday, March 14, 2010

New Website for the Master Address Repository Website

As part of a major revamp of the website for the Office of the Chief Technology Officer, the website for the Master Address Repository has also been revamped.

The corresponding links on this blog have been updated.

Thursday, March 4, 2010

4th Street SW between I Street SW and M Street SW is Almost Complete


4th Street SW between I Street SW and M Street SW is almost complete. T his is is a new portion of 4th Street SW which will help create a finer road grid in SW Waterfront neighborhood. The address range is between 900 - 1199 4th Street SW.
Also: DCRA will be moving right here to 1100 4th Street SW on March 22.


Tuesday, March 2, 2010

MAR Monthly Report: February 2010


--------------------
Dataset Numbers:
• Addresses: 142,005
• Residential Units: 193,261
• Aliases: 5,308
• Street Name Aliases: 1,055
• Intersections: 16,391
• Blocks: 15,825
• Address / SSL Cross Reference: 235,015

--------------------

News:
  • The intersection file has been updated. New intersections include Champlain Street NW and Florida Avenue NW, Foxview Circle NW and Hoban Road NW.
  • Over 3,000 residential units were added to the MAR during February, bring the residential units table to 193,261 record. There are an estimated 196,000 to 202,000 residential units in DC.

Wednesday, February 24, 2010

2600 Independence Avenue SE


The address 2600 Independence Avenue SE has been added to the MAR. It is the location for the SWIRL Pumping Station. The address was found today during field research.

House in Anacostia



2253 Mount View Place SE

(picture taken during field research)

Tuesday, February 16, 2010

DC GIS Email Lists


DC GIS is now using a new system, called Gov Delivery, to deliver and manage email lists for those that are interested. Using this Gov Delivery system one can choose to customize which email lists to sign up for. The Monthly MAR Email Update is included in this system.
To sign up for the email list(s):
  1. Go to DC GIS Webpage
  2. Click on the 'Sign Up for DC GIS Updates' image (on top right corner)
  3. Type in your email address
  4. Click 'Go'
  5. Then choose which email lists to subscribe to
  6. The email list with MAR News (as well as other GIS data updates) is called 'GIS Data Updates (MAR, VPM and All Other)'

Monday, February 8, 2010

No Field Research Today

Constitution Avenue near the White House

Thursday, February 4, 2010

Open Government & The MAR

Of governments and geeks (Economist) - In 2008 the city of Washington, DC, a trailblazer in the field of open data, sponsored a contest called “Apps for Democracy”—with $50,000 in costs and prize money—which produced 47 applications.

A decent percentage of the open data that is made available in Washington, DC uses the Master Address Repository to acquire accurate location information.

Improvements to the Intersection Table


Currently the MAR Intersection Table only contains 'regular' at grade intersections. It does not include intersections where there is an overpass or underpass or ramps (such as ramps off of INTERSTATE 295). This is a shortcoming of the MAR and is being remedied. Situations occur at these location also and they need to be locatable using the MAR.
There are two phases for adding underpasses, overpasses and ramps to the Intersection Table:


Phase I
  • Add Underpasses (ex: FIRTH STERLING AVENUE SE UNDER INTERSTATE 295)
  • Add Overpasses (ex: INTERSTATE 295 NORTHBOUND OVER FIRTH STERLING AVENUE SE)
Phase II
  • Add Ramps (ex: NORTHBOUND NORTH CAPITOL STREET NE AND RAMP FROM EASTBOUND IRVING STREET NE)
Currently the overpasses and underpasses have been digitized and are undergoing testing. In order to easily find these location the code for the MAR Web Services will also need to be updated. Many of the ramps still need to be digitized. The overpasses and underpasses should be in production by the end of February.

Wednesday, February 3, 2010

Duplicate Address Problem at 3233 15th Place SE - Still Not Resolved

The duplicate address problem at 3233 15th Place SE has still not been resolved by DCRA. That is that both a cemetery and a townhouse use the address 3233 15th Place SE. The recommended solution is changing the address of the townhouse to 3233 1/2 15th Place SE. The cemetery had the address of 3233 15th Place SE before the townhouse was built, and thus the cemetery's claim to the address takes precedence.

DCRA needs to resolve this issue by informing the owner of the townhouse of the need to change their address. The homeowner then needs to physically change the address number on the exterior of their townhouse. Additionally, DCRA also needs to contact the various agencies to inform them of the new address 3233 1/2 15th Place SE.

Monday, February 1, 2010

***** Monthly MAR Data & Information Report: January 2010 *****




Dataset Numbers:


  • Addresses: 14,1972
  • Residential Units: 189,913
  • Aliases: 5,295
  • Street Name Aliases: 1,055
  • Intersections: 16,382
  • Blocks: 15,825
  • Address / SSL Cross Reference: 235,728
---------------

News:
  • Work started on going through mailing addresses for property tax bills to see if missing addresses (from the MAR) could be found. If missing addresses are found they will be added to the MAR.

Wednesday, January 27, 2010

Bloomingdale Court NW

Bloomingdale Court NW (in yellow)



A previously unnamed alley located between 1st Street NW, Flagler Place NW, U Street NW and V Street NW has been named Bloomingdale Court NW by the DC Council. There are a few addresses that will have a Bloomingdale Court NW designations.

Here is the announcement regarding the resolution: Bloomingdale Court NW - DC Council Resolution (pdf)

Thursday, January 7, 2010

***** Monthly MAR Data & Information Report: December 2009 *****




Dataset Numbers:

  • Addresses: 141945
  • Residential Units: 189838
  • Aliases: 5216
  • Street Name Aliases: 1055
  • Intersections: 16382
  • Blocks: 15825
  • Address / SSL Cross Reference: 236030
---------------

News:
Work continues on adding street underpasses & overpasses & ramps to the Intersection table.

Major update of addresses at the Capitol Quarter development in SE.

MAR Addresses were used to complete the Census's New Construction program in preparation for the 2010 Census.