DCGIS.FireHydrantPt

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Water and Sewer Authority
Publication_Date: 20080316
Title: DCGIS.FireHydrantPt
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage:
<http://dcatlas.dcgis.dc.gov/catalog/download.asp?downloadName=FireHydrantPt&downloadTYPE=ESRI>
Online_Linkage:
<http://dcatlas.dcgis.dc.gov/catalog/download.asp?downloadName=FireHydrantPt&downloadTYPE=KMZ>
Larger_Work_Citation:
Citation_Information:
Originator: DC GIS
Title: DC Geographic Information System
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
Fire Hydrants. This layer contains points representing locations for fire hydrants in the District of Columbia. It was downloaded from the DC WASA website.
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.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20080316
Currentness_Reference: publication date
Status:
Progress: In work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.114246
East_Bounding_Coordinate: -76.909843
North_Bounding_Coordinate: 38.995327
South_Bounding_Coordinate: 38.810381
Data_Set_G-Polygon:
Data_Set_G-Polygon_Outer_G-Ring:
G-Ring_Point:
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Fire
Theme_Keyword: Hydrant
Theme_Keyword: Water
Theme_Keyword: WASA
Theme_Keyword: emergency
Theme_Keyword: public safety
Place:
Place_Keyword: Washington, D.C.
Place_Keyword: District of Columbia
Place_Keyword: DC
Place_Keyword: WASA
Use_Constraints:
For data terms and conditions, go to <http://dc.gov/page/terms-and-conditions-use-district-data>
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: DC Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 441 4th St NW, Suite 930 South
City: Washington
State_or_Province: DC
Postal_Code: 20001
Country: USA
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5:00 pm
Contact_Instructions:
Alternate Contact: Skip Tompkins DC Water and Sewer Authority Office of Engineering Services Office: (202) 787-2437 Fax: (202) 645-6245 lee_tompkins@dcwasa.com
Data_Set_Credit: DC Water and Sewer Authority
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Data believed to be complete and accurate as of the time period cited. Subject to change. Digital version compared with original source data for accuracy and completeness. In process of validation by source and/or responsible agency.
Logical_Consistency_Report: In process of validation by source and/or responsible agency.
Completeness_Report:
Data believed to be complete and accurate, subject to change. Digital version compared with original source data for accuracy and completeness. In process of validation by source and/or responsible agency.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
From the spatial accuracy sample check, less than half of the planimetric fire hydrants were within 10 meters of a WASA one, with a small percentage of those within a meter. The planimetric features have a horizontal accuracy of approximately 1 meter.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: N/A
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: DC WASA
Publication_Date: 10/01/03
Title: Fire Hydrant Cards
Geospatial_Data_Presentation_Form: document
Other_Citation_Details:
Cards range in date from 1900-2003. Data was entered into a database which was used for geocoding.
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 10/01/03
Source_Citation_Abbreviation: Fire Hydrant Cards
Source_Contribution: Locations and Attributes
Source_Information:
Source_Citation:
Citation_Information:
Originator: WASA
Publication_Date: 10/01/03
Title: WASA Counter Maps
Geospatial_Data_Presentation_Form: map
Other_Citation_Details: Maps range in date from 1900-2003.
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 10/01/03
Source_Citation_Abbreviation: WASA Counter maps
Source_Contribution: Locations and attributes
Source_Information:
Source_Citation:
Citation_Information:
Title: WASA Hydrants Database
Type_of_Source_Media: database
Source_Citation_Abbreviation: WASA hydrants database
Source_Contribution: Location and attributes
Source_Information:
Source_Citation:
Citation_Information:
Originator: DC Water and Sewer Authority
Publication_Date: 20080316
Title: Fire Hydrants
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: <http://www.dcwasa.com>
Type_of_Source_Media: kmz file
Source_Citation_Abbreviation: WASA fire hydrants
Source_Contribution: attributes and location
Process_Step:
Process_Description:
Original Data Capture and QA/QC:
Fire hydrants were identified based on records in the WASA fire hydrants database, WASA's water and sewer counter maps, and WASA's fire hydrant cards. Addresses were geocoded and converted to an ArcGIS coverage. Information from fire hydrant cards, containing attributes for each hydrant, was entered into a database by WASA. That database was used as a source of attribute data. Hydrant points were referenced to planimetric features in layers in the DC GIS database, such as roads, buildings, and property squares. WASA counter maps were also used for reference.
QA/QC:
Prior to capturing the fire hydrants and their associated attributes, a GIS QC Analyst checked that the georeferenced raster image fit the base map properly. Any adjustments to the geo-position of the raster image were made prior to digitizing the fire hydrants.
Fire Hydrant Capture:
An ArcMap project was set up with the geocoded fire hydrants and symbology. A water counter map raster image was displayed and made transparent over an orthophoto mosaic of DC. Fire hydrant points were moved if necessary to line up with fire hydrant marks on the water maps. If a fire hydrant mark existed on the water map but was not among the geocoded points, a new hydrant point was digitized. At the end of the capture process, each fire hydrant was labeled with its attributes. A visual QC check was performed by verifying that every fire hydrant on the map was captured, the position of the fire hydrant was correct, and that the database attributes match the raster map label.
Removal of Duplicates:
A query was conducted to remove all Hydrants containing the note "DUPLICATE LOCATION" in the "DESCREPENCY1" field. (continued)
Sequential Numbering:
A sequential numbering system was created based on the install date field. This field is "Hyd_se_new". Starting with null values and ending with the most recent install date, sequnetial numbers were added for each record.
Adding Unique IDs
Unique identifiers are constructed in the following manner: "H" + [Hyd_se_new] + "-" + [QUADRANT] + "-" + [COUNTER]
District Government QA/QC:
OCTO staff reviewed a sample of the fire hydrant data for adherence to metadata and other documented standards, valid values for items where viable, and spatial accuracy.
Staff performed a comprehensive review of the data for ten WASA counter map scans. This involved: 1.) performing visual checks of the digital data against the scans; 2.) verifying attribute information with fire cards and other relevant sources: 3.) evaluating the data with the planimetrics and orthophoto; 4.) assessing duplicate discrepancy information; and 5.) generating checkplots where needed.
On average, the chosen WASA counter maps contained 24 hydrants and 10 duplicates. A shapefile containing all of the errors identified in these checks was created along with an error list.
Staff then performed a nearest neighbor analysis against planimetric fire hydrant features, as well as spot checks, to assess the spatial accuracy of the WASA hydrants. Since the planimetric layer was incomplete, this analysis provided a cursory review of the spatial accuracy. Results are listed in the horizontal positional accuracy report section of the metadata
Process_Date: 20031001
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: D.C. Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 200 I Street SE, 5th Floor
City: Washington
State_or_Province: DC
Postal_Code: 20001
Country: USA
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5:00 pm
Process_Step:
Process_Description:
Since the original data capture in 2003, DC Fire and Emergency Medical Services staff have field verified and updated fire hydrants. This particular file was pulled from the DC WASA website and converted from KML to ESRI format. DC is publishing what WASA is providing to the public.
Process_Date: 20080316
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 200 I Street SE, 5th Floor
City: Washington
State_or_Province: DC
Postal_Code: 20001
Country: USA
Contact_Facsimile_Telephone: 202-727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30am - 5pm
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\temp\FireHydrantPt.xml
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 10400
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 1900
Lambert_Conformal_Conic:
Standard_Parallel: 38.300000
Standard_Parallel: 39.450000
Longitude_of_Central_Meridian: -77.000000
Latitude_of_Projection_Origin: 37.666667
False_Easting: 400000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000063
Ordinate_Resolution: 0.000063
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 0.250000
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: DCGIS.FireHydrantPt
Entity_Type_Definition: Fire Hydrants
Attribute:
Attribute_Label: DESCRIPTION
Attribute_Definition: Fire Hydrant Description in html
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ASSETNUM
Attribute:
Attribute_Label: INSERVICE
Attribute:
Attribute_Label: LOCATIONDETAIL
Attribute:
Attribute_Label: ISNFPA
Attribute:
Attribute_Label: LASTSERVICEDT
Attribute:
Attribute_Label: BATTALION
Attribute:
Attribute_Label: ENGINEID
Attribute:
Attribute_Label: XCOOR
Attribute:
Attribute_Label: YCOOR
Attribute:
Attribute_Label: DCS_LAST_MOD_DTM
Attribute:
Attribute_Label: SHAPE
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Unique Id
Attribute:
Attribute_Label: SE_ANNO_CAD_DATA
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: DC Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 200 I Street SE, 5th Floor
City: Washington
State_or_Province: DC
Postal_Code: 20001
Country: USA
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5:00 pm
Contact_Instructions:
OCTO is authorized to distribute this data only to DC agencies. All other parties should contact WASA directly. The contact information for WASA is below.
Skip Tompkins D.C. Water and Sewer Authority Office of Engineering Services Office: (202) 787-2437 Fax: (202) 645-6245 lee_tompkins@dcwasa.com
Resource_Description: Downloadable Data
Distribution_Liability:
For data terms and conditions, go to <http://dc.gov/page/terms-and-conditions-use-district-data>
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 0.040
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Ordering_Instructions: All data is available at <http://opendata.dc.gov>
Metadata_Reference_Information:
Metadata_Date: 20090826
Metadata_Review_Date: 03142008
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: DC Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 200 I Street SE, 5th Floor
City: Washington
State_or_Province: DC
Postal_Code: 20001
Country: USA
Contact_Facsimile_Telephone: (202) 727-5660
Contact_Electronic_Mail_Address: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5:00 pm
Contact_Instructions:
OCTO is authorized to distribute this data only to DC agencies. All other parties should contact WASA directly. The contact information for WASA is below.
Alternate Contact: Skip Tompkins D.C. Water and Sewer Authority Office of Engineering Services Office: (202) 787-2437 Fax: (202) 645-6245 lee_tompkins@dcwasa.com
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None.
Metadata_Use_Constraints: None.
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.12 on Thu Jun 25 14:50:58 2015