Stairs

Keywords
About: Grates
Taking place at: Washington, D.C., District of Columbia, DC, DC GIS, DCGIS

Abstract

Stairs. The dataset contains polygons representing planimetric grates created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO). These features were originally captured in 1999 and updated in 2005 and 2008. The following planimetric layers were updated using 2008 imagery - Grates (GratePt) - Bollards (BollardPt) - Stairs (StairPly) - Pools (SwmPoolPly). 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.

Purpose

This data is used for the planning and management of Washington, D.C. by local government agencies.

Use constraints

Acknowledgment of the DC Geographic Information Systems Program (DC GIS). The District of Columbia Government 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.

Point of contact

GIS Data Coordinator
in DC Office of the Chief Technology Officer (OCTO)

801 7th Street SW
Washington DC , 20024, USA

phone: (202) 727-5660
hours: 8:30 am - 5:00 pm

Credits

Office of the Chief Technology Officer

Data accuracy

Accuracy
Validated by source and/or responsible agency.

Logical consistency
Validated by KCI Technologies, Inc. and OCTO. OCTO developed and operated a QA/QC program to check the deliverables. Generally, the program consists of various types of processes grouped into visual checks, automated procedures, edge-matching routines, and specialized checks.

Staff identified issues in a shapfile with appropriate descriptions for the vendor to fix. The data was delivered in preliminary format for a thorough review and identification of issues. The vendor fixed the data and delivered final data which OCTO checked to ensure the vendor made the fixes appropriately.

Completeness
Data believed to be complete and accurate, subject to change. Validated by responsible agency"

Horizontal positional accuracy
Horizontal Accuracy of updated 2008 planimetric data is in accordance with ASPRS Class I Accuracy standards for 1"=100' scale mapping.

Vertical positional accuracy
N/A

Lineage / Sources

• Aerial Photography - 2008
  filmstrip, New aerial photography was collected in the Spring of 2008 to support new orthoimagery and planimetric updates. This aerial photography was composed of approximately 52 flight lines and a total of 1552. The mission was flown with one Vecxel Ultracam X camera and collected ABGPS and IMU for each exposure.
  aerial photography
  by Office of the Chief Technology Officer, 20080528

Distribution

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.

Distribution liability
Acknowledgment of the DC Geographic Information Systems Program (DC GIS). The District of Columbia Government 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.

Distributed by
GIS Data Coordinator
in DC Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5:30 pm

Entity

DCGIS.StairsPly

Attributes

• CAPTUREACTION
  capture action of feature
• Shape / ESRI
  Feature geometry
• GIS_ID
  OCTO GIS sequential identifier
• FEATURECODE
  Feature code
• OBJECTID / ESRI
  Internal feature number.
• CAPTUREYEAR
  Capture date of feature
• SHAPE / ESRI
  Feature geometry.
• DESCRIPTION
  Feature code description
• SHAPE.AREA
  
• SHAPE.LEN
  

Metadata

Provided by
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5 pm