20260504
08250000
1.0
FGDC CSDGM Metadata
FALSE
EllsworthAFBlimits
1234984.789924
1252813.366800
651504.621047
684094.059805
1
002
Projected
GCS_NAD_1983_2011
Linear Unit: Foot_US (0.304801)
NAD_1983_2011_StatePlane_South_Dakota_South_FIPS_4002_Ft_US
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20240614
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Pennington County - Rapid City GIS
605-716-3672
300 6th Street
GIS Division
Rapid City
SD
57701
US
gis2@rcgov.org
M - F; 7:30am - 4:00pm
see https://www.rcgov.org/departments/public-works/geographic-information-system/gis-data-216.html for a price list
Contact GIS Division
Normally 2-3 business days
ESRI ArcMap
many
pgdb, fgdb, .shp
spatial data with attribute information
DXF
many
AutoCAD dxf file produced by ArcCatalog conversion of SDE feature class
spatial data
Ellsworth AFB Boundary
Feature Class
2004-07-26
Pennington County - Rapid City GIS
Rapid City, South Dakota
Pennington County - Rapid City GIS
EllsworthAFBlimits
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This data set contains the latest available version of the area within the boundary of Ellsworth AFB, South Dakota, based on the base master plan and legal property descriptions. The areas and boundaries depicted were created primarily from aerial mapping methods and do not represent a legal survey of the land.</SPAN></P></DIV></DIV></DIV>
This data set was developed to provide a current map of the boundary of Ellsworth AFB for general use within the Pennington County - Rapid City GIS.
Original digital maps of Pennington County parcels were maintained by the Pennington County Director of Equalization mapping specialist. The Civil Engineering group at Ellsworth AFB provided the base boundary information.
Pennington County - Rapid City GIS
605-716-3672
GIS Division
300 6th Street
Rapid City
SD
57701
US
gis2@rcgov.org
M - F; 7:30am - 4:00pm
Ellsworth AFB
South Dakota
Pennington County
ISO 19115 Topic Category
boundaries
Ellsworth AFB
South Dakota
boundaries
Pennington County
see Use Constraints
Use of this data requires acceptance of the applicable Pennington County - Rapid City GIS data agreement included in the Use Constraints section.
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 7 0;"><SPAN>The data user (hereafter "The User") understands and acknowledges that the GIS Product File(s) listed above were created from GIS data files and developed for internal use only. The GIS data is subject to constant change and the accuracy and completeness cannot be guaranteed. The GIS data is provided "as is" without warranties or guarantees, either expressed or implied, as to the completeness, accuracy, or correctness of such GIS data, fitness for a particular purpose, or warranty that the information does not infringe the rights of others, nor accepts any liability arising from any incorrect, incomplete or misleading information contained therein. The City of Rapid City is not responsible for incidental, consequential, or special damages arising out of the use of the GIS data provided the User. The User agrees that the GIS Product File(s) shall be used and relied upon only at the risk of the User. The User agrees to indemnify and hold harmless the City of Rapid City, its officials, officers, employees and servants from any liability, claims, loss, damages, injury, costs and attorney fees arising out of procuring, compiling, collecting, interpreting, production, using or communicating the GIS Product File(s) or information contained therein. These data do not represent a legal survey of the land. Data were created from aerial mapping methods.</SPAN></P></DIV></DIV></DIV>
Pennington County, South Dakota Tax Parcels
2006-06-26
Pennington County - Rapid City GIS
Rapid City, South Dakota
Pennington County - Rapid City GIS
vector digital data
ground condition
2007-06-07
Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595
1
-103.129798
-103.057803
44.177970
44.086993
No internal topological errors were found to exist using the ArcMap 9.1 "polygons must not overlap" test. Boundaries were also tested for coincidence with tax parcels (where they were created from parcels) and were found to have no errors. Coincidence was defined as within 0.1 feet. Coincidence with road centerlines was not tested. Test date: 20060620. Annexations are tested when they are created.
No internal topological errors were found to exist using the ArcMap 9.1 "polygons must not overlap" test. Boundaries were also tested for coincidence with tax parcels (where they were created from parcels) and were found to have no errors. Coincidence was defined as within 0.1 feet. Coincidence with road centerlines was not tested. Test date: 20060620. Annexations are tested when they are created.
The data set contains all the area within the boundary of Ellsworth AFB.
The CITYNAME attribute identifies areas within the base boundary. The base does not annex property like incorporated municipalities, thus the boundary is mostly unchanging. No formal procedures for the notification of changes exist between the GIS Division and the base. Changes in Pennington County would likely be found by the Pennington County Department of Equalization through ownership changes. The GIS Division has no formal relationship with the Meade County GIS, thus changes in Meade County would likely not be detected. There is an overlap between the base property and the City of Box Elder. Box Elder has annexed a few parts of the base.
The boundary postition is ulitmately dependent upon two data sources: the USGS DOQQs and the Pennington County tax parcel feature class. Random tests of the DOQQs that cover the same area as the Rapid City orthophotos indicate a difference of 15 - 20 feet. (Tests of the Rapid City orthos indicate most positions are within 1 foot of first order or better survey monuments.) Random visual inspections of parcel line locations show that most of them are within 5 feet of the apparent ground position. Some areas where the conversion vendor used the wrong procedure are off by 20 - 30 feet. The net error estimate for the Quinn boundary is about 20 feet from a true position for the DOQQ base, and an additional 5 feet for the parcel base. Relative accuracy of the boundary line with respect to the parcels is excellent. No known discrepancies exist between these two data sets. The boundary data received from the base was adjusted to match the tax parcels, thus it should have the same accuracy as the parcels.
Estimate of accuracy based on the data used to create the boundary.
25 feet
The Ellsworth AFB boundary was received in 2000 in AutoCAD dxf format, which was converted to a coverage for use in the GIS. The part of the base in Pennington County was adjusted to match the tax parcels. About two thirds of the base is in Meade County. No digital data from Meade County were available to compare or adjust the base boundary, so that part was not altered. The base boundary coverage was converted to an SDE feature class in 2003.
From 1989 through 2000, new parcels were created by digitizing or COGOing property plats into the existing Microstation .dgn files. Rectified (not ortho corrected) digital photos were used to help align property lines. As new photos were obtained, about every three years, a number of lines had to be moved, especially in areas of high relief.
The tax parcel feature class, upon which the boundary is mainly based, was originally created in 1989. Lines were digitized and COGOd from property plats into files at three different scales: 1:7200, 1:2400, and 1:1200. The USGS quadrangle section corners were used as control.
Plats containing maps and survey descriptions are used to create new tax parcels.
Property plats
Plats
various local surveyors
ground condition
Digital tax parcel maps were visually matched to 1:12,000 USGS DOQQs when converted to Arc/INFO coverages. Road centerlines (which are used for some city limit lines) were digitized on top of the DOQQs.
12000
USGS 1:12,000 DOQQs
DOQQs
1997-01-01
USGS
publication date
The base boundary was extracted from the master plan.
Ellsworth AFB master plan
Base master plan boundary layer
Ellsworth AFB civil engineering group
publication date
2000-01-01
Rectified aerial photos (not ortho corrected) were used to help place property lines in the original digital files, and for maintenance in the Microstation environment.
Rectified aerial photos
Rectified aerial photos
Various aerial photo firms
ground condition
The original digital parcel maps were controlled by section corners digitized from the USGS quadrangles.
24000
USGS 1:24,000 Quadrangles
Quadrangles
USGS
publication date
Section corners from the quadrangles were used as control for the digital parcel maps. DLGs were used for the western half of Pennington County. Section corners were digitized from DRGs for the eastern half of the county, where DLGs have not yet been created.
24000
1:24,000 USGS DLGs and DRGs
DLGs and DRGs
USGS
publication date
In 2000, the City of Rapid City and Pennington County undertook a project to convert the parcel lines to Arc/Info coverage format and to adjust them visually to the USGS DOQQs and the Rapid City area orthophotography. The 1:24,000 DLG section lines and locally created 1:24,000 DRG-based section lines (for the eastern half of the county) served as control for the project. The three different scales of data were merged into township sized coverages. This conversion yielded reasonably good data in the eastern half of the county, but problems were noted in the western half. The conversion vendor incorrectly moved section lines in some tax parcels to match the DLG section lines, rather than moving the parcels to the correct section. To date, the displacements caused by these problems have not been corrected. Road centerlines, which are used for a small number of city limit lines, are matched to the Rapid City area orthophotos and the DOQQs outside of the Rapid City area.
2000-08-01
In 2003, the Arc/INFO township coverages were merged into one county parcel SDE feature class. Maintenance has continued using ArcMap software.
2003-01-01
EllsworthAFBlimits
Areas within the boundary of the base
Base master plan
Feature Class
1
OBJECTID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
OBJECTID
OID
4
10
0
CityName
Name of the base for all areas within the boundary
Base master plan
ELLSWORTH AFB
CityName
String
15
0
0
LastUpdate
Last update
Date
8
0
0
Shape
Feature geometry.
ESRI
Coordinates defining the features.
SHAPE
Geometry
4
0
0
GlobalID
GlobalID
GlobalID
38
0
0
created_user
created_user
String
255
0
0
created_date
created_date
Date
8
0
0
last_edited_user
last_edited_user
String
255
0
0
last_edited_date
last_edited_date
Date
8
0
0
Shape.STArea()
SHAPE.STArea()
Double
0
0
0
Shape.STLength()
SHAPE.STLength()
Double
0
0
0
dataset
EPSG
8.9.3(10.3.1)
1
Simple
FALSE
1
TRUE
FALSE
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Pennington County - Rapid City GIS
605-716-3672
GIS Division
300 6th Street
Rapid City
SD
57701
US
gis2@rcgov.org
M - F; 7:30am - 4:00pm
Pennington County - Rapid City GIS