OWNERLN

Department of Consumer of Regulatory Affairs (DCRA) - Office of the Surveyor (OS) Office of Tax and Revenue (OTR) - Real Property Tax Administration (RPTA) Office of Chief Technology Officer (OCTO) - DC GIS Weekly OWNERLN vector digital data DC GIS withheld withheld DC GIS DC Geographic Information System vector digital data OWNERLN Owner lines. The dataset contains attributes (dimensions) of owner lines, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies. The creation of this layer is automated, occurs weekly, and uses the most currently available property information. The date of the extract can be found in the EXTRACTDATfield of the Ownerply layer. Please visit http://vpm.dc.gov/ for additional information. All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters. METADATA CONTENT IS IN PROCESS OF VALIDATION AND SUBJECT TO CHANGE. This data is used for the planning and management of land within Washington, D.C. by local government agencies. The Owner Lines layer is derived from the following Vector Property Map line layers (Air Rights Lots, Tax Lots, Parcel Lots, Record Lots, and Reservations). The creation of this layer is automated, occurs weekly, and uses the most currently available property data. The date of the extract can be found in the EXTRACTDATfield of the Ownerply layer. en Weekly ground condition In work Weekly -77.119414 -76.909258 38.995977 38.801593 389655.516655 407860.703556 125988.219558 147559.577028 none Property location Lot Land Cadastral Square Washington, D.C. District of Columbia DC DC GIS DCGIS Contact OCTO GIS. Any data obtained outside of OCTO GIS are unauthorized copies. Data cannot be redistributed in any manner without written authorization. OCTO makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein. Office of the Chief Technology Officer GIS Data Coordinator mailing and physical address

441 4th St NW, Suite 930 South

Washington DC 20001 USA 202-727-5660 dcgis@dc.gov 8:30am - 5:30pm Department of Consumer of Regulatory Affairs (DCRA) - Office of the Surveyor (OS), and Office of Tax and Revenue (OTR) - Real Property Tax Administration (RPTA) Office of Chief Technology Officer (OCTO) - DC GIS ESRI ArcCatalog 9.3.1.4000 Feature Class Validated by source and/or responsible agency Vector Property Map QA/QC 1.) Specifications: Projection Parameters: Coord. System - NAD83, StatePlane, MD, FIPS 1900, meters. Correct Extent and Mapping Tolerances: Mapping tolerances implicitly define accuracy and precision of the vector feature datasets. Min X: 389000, Max X: 408000, Min Y: 124700, Max Y: 147900 Precision: 92563.95 (close to 5 decimals of precision) Cluster Tolerance: .003048006 2.) QA/QC Steps Attribute Verification - Database Structure, Domain Values, Field Population Topological Consistency - Verified Topology against a list of rules, as follows: Source Checks Squares were reviewed against their respective source documents (Record Lots- Subdivision Plats, Tax Lots- A&T Plats) and checked for the following: - Ensure all lots were captured for each square - Check all lot line dimensions and square footages - Check for missing building restriction lines on original source plats - Check for proper lot bearings - Insure correct units were captured Squares and Lots Best Fit - Check each squares best fit against the 2002 imagery and ground level features such as curb, sidewalk and buildings. Errors found during DC QC process were cycled back to vendor until all correction had been completed. Data is mostly complete thru April 2015. The following issues exist in the property data: 1.) Some squares contain COGO linework entered using degress, minutes, and seconds, as opposed to decimal degrees. This causes spatial inaccuracies that grow as the length of the line gets longer. 2.) Squares with alley/street closings/dedication transactions are currently being processed. 3.) Not all Parcels that reside outside of a Square(s) boundary have been processed/created. Other 1.) Alleys, Building restriction lines, Highway Plans, and Easements are captured if they were on the source material. Source material is active as of November 2002. It is known that not all of these features were captured. 2.) Street width is approximate. Users should rely on the published official street widths to set up property lines or determine right-of-way (this is from the DC Land Surveyors Hand Book). Likewise this should be taking into consideration when doing certain types of GIS analysis utilizing the VP data. 3.) Some Squares are divided by streets. That is, the same Square continues on the other side of the street. Since squares are islands and not generated from ground features, staff "best fit" each square to the Earth. Since there is no citywide Survey Coordinate System, squares are placed in their approximate location. Once a square was COGO'ed/created it became a "floating islands" without geographic positioning. Because of this, captured property data had to be positioned relative to other geospatial files that themselves are geo-referenced. Thus, they were fit to the digital ortho's and planimetrics compiled at a scale of 1:100 or 1" ='s 83.3ft. Squares were visually positioned over the appropriate area in of the orthophoto and planimetrics (ground level feature were primary source). For the "best fit" to ortho, 95% of features are within 2 meters of their true position on the 2002 orthophoto. Within a square, the property map relative accuracy is approximately 2 feet. - Each Square is an Island, alone unto itself. - Street width is approximate. The published official street widths to set up property lines or determine right-of-way are correct. There is digital scan information available from DDOT regarding Right-of-Way widths. N/A Department of Consumer and Regulatory Affairs - Office of Surveyor 2006 subdivision plats map http://dcra.dc.gov hardcopy Assesstment&Taxation (A&T) and subdivision plats, Surveys location Office of the Chief Financial Officer - Real Property Tax Administration 2006 Assessment and Taxation plats map http://ocfo.dc.gov hardcopy map Assessment and Taxation plats location The Office of Tax and Revenue (OTR), RPTA division's public extract was compared against the COL Polygon layer once all features were appended. The COL Polygon layer was then matched against the individual VPM line layers (Air Rights Lots, Tax Lots, Parcel Lots, Record Lots and Reservations) by the SSL field to extract features and create the Owner Line layer. withheld 09/31/05 Office of the Chief Technology Officer GIS Data Coordinator mailing and physical address

<The city of the process Contact Person.> <The state or province of the process Contact Person.> <The ZIP or other postal code of the process Contact Person.> <The country of the process Contact Person.> 202-727-5660 dcgis@dc.gov 8:30am - 5:30pm Metadata imported. Updated with April 14, 2015 Vector Property data Vector Simple FALSE 0 TRUE FALSE coordinate pair 0.000011 0.000011 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 NAD_1983_StatePlane_Maryland_FIPS_1900 1.000000 Explicit elevation coordinate included with horizontal coordinates OwnerLn_PF1 Feature Class 0 Shape Feature geometry ESRI Coordinates defining the features. OBJECTID OID 4 10 0 RES CREATION_DT Date 8 0 0 OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. PAR String 50 0 0 PAR Parcel Number Square, Suffix, Lot String 50 0 0 SSL Lot Square Suffix and Lot SHAPE.LEN Double 0 0 0 SHAPE.LEN RECORDATION_DT Date 8 0 0 RECORDATION_DT NARRATIVE String 200 0 0 NARRATIVE EXPIRATION_DT Date 8 0 0 EXPIRATION_DT Status Integer 4 10 0 STATUS SHAPE Geometry 8 0 0 Feature geometry. Esri Coordinates defining the features. SHAPE Feature geometry. ESRI Coordinates defining the features. SQUARE String 50 0 0 SQUARE Square value from the SSL identifier. SUFFIX String 50 0 0 SUFFIX Suffix value from the SSL identifier. LOT String 40 0 0 LOT The Lot value of SSL identifier. RECORD_LENGTH_FT Double 8 38 8 RECORD_LENGTH_FT RECORD_BEARING String 50 0 0 RECORD_BEARING RECORD_BEARING_DIR Integer 4 10 0 RECORD_BEARING_DIR RECORD_BEARING_ANGLE_DD Double 8 38 8 RECORD_BEARING_ANGLE_DD RECORD_ARC_LENGTH_FT Double 8 38 8 RECORD_ARC_LENGTH_FT Record_Delta_Angle_DD Double 8 38 8 RECORD_DELTA_ANGLE_DD Record_Radius_FT Double 8 38 8 RECORD_RADIUS_FT COMPUTED_LENGTH_FT Double 8 38 8 COMPUTED_LENGTH_FT COMPUTED_BEARING_DIR Integer 4 10 0 COMPUTED_BEARING_DIR COMPUTED_BEARING_ANGLE_DD Double 8 38 8 COMPUTED_BEARING_ANGLE_DD Computed_Delta_Angle_DD Double 8 38 8 COMPUTED_DELTA_ANGLE_DD Computed_Arc_Length_FT Double 8 38 8 COMPUTED_ARC_LENGTH_FT Computed_Radius_FT Double 8 38 8 COMPUTED_RADIUS_FT KILL_DT Date 8 0 0 KILL_DT LOT_TYPE Integer 4 10 0 CREATEDBYRECORD Created By Record GUID 38 0 0 RETIREDBYRECORD Retired By Record GUID 38 0 0 DIRECTION Direction Double 8 38 8 DISTANCE Distance Double 8 38 8 RADIUS Radius Double 8 38 8 ARCLENGTH Arc Length Double 8 38 8 RADIUS2 Radius 2 Double 8 38 8 COGOTYPE COGO Type Integer 4 10 0 ISCOGOGROUND Is Cogo Ground Integer 4 10 0 ROTATION Rotation Double 8 38 8 SCALE Scale Double 8 38 8 CREATED_DATE Created Date Date 8 0 0 LAST_EDITIED_DATE Modified Date Date 8 0 0 GLOBALID GLOBALID GlobalID 38 0 0 LOT_TYPE Denotes the type of lot. 1 Record Lot 2 Tax Lot 3 Air Rights 4 Reservation 5 Appropriation 6 Parcel Lot SE_ANNO_CAD_DATA Blob 0 0 0 SE_ANNO_CAD_DATA RES String 50 0 0 DC Office of the Chief Technology Officer GIS Data Coordinator mailing and physical address

441 4th St NW, Suite 930 South

Washington DC 20001 USA (202) 727-5660 dcgis@dc.gov 8:30 am - 5:30 pm Downloadable Data OCTO makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred, with respect to the information or data furnished herein. Subject to terms and conditions of the Memorandum of Agreement. Memorandum of Agreement must have authorized signature. 0.040 Most DC GIS datasets can be downloaded from "http://dcgis.dc.gov" on the data center page. Orders can also be made by contacting OCTO GIS at "dcgis@dc.gov", especially for datasets not available for download. 20150414 4/14/2015 D.C. Office of the Chief Technology Officer GIS Data Coordinator mailing and physical address

441 4th St NW, Suite 930 South

Washington DC 20001 USA (202) 727-5660 dcgis@dc.gov 8:30 am - 5 pm REQUIRED: The telephone number by which individuals can speak to the organization or individual. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en 20260219 17433000 FALSE 20260323 15594000 OwnerLn_PF1 002 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_Maryland_FIPS_1900_Feet <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.2.0'><WKT>PROJCS["NAD_1983_StatePlane_Maryland_FIPS_1900_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1312333.333333333],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-77.0],PARAMETER["Standard_Parallel_1",38.3],PARAMETER["Standard_Parallel_2",39.45],PARAMETER["Latitude_Of_Origin",37.66666666666666],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",2248]]</WKT><XOrigin>-120561100</XOrigin><YOrigin>-95444400</YOrigin><XYScale>3048.0060960121905</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.00328083333333333</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102685</WKID><LatestWKID>2248</LatestWKID></ProjectedCoordinateSystem> 20260323 15594000 1.0 20260323 Esri ArcGIS 13.2.0.49743 OwnerLn_PF1 389655.516655 407860.703556 147559.577028 125988.219558 1 -77.119414 -76.909258 38.995977 38.801593 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Feature Class Enterprise Geodatabase Feature Class NAD_1983_StatePlane_Maryland_FIPS_1900 EPSG 5.3(9.0.0) 0