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The County_Gen feature class describes the generalized location and boundaries of the United States Counties and equivalent governmental units. It includes common identifiers for these entities so this data set can be used in conjunction with other data sets describing counties. This feature class is a US Forest Service Standard Reference Dataset and is the preferred spatial representation of counties for use by the US Forest Service. Since it is a generalized layer, it should only be used for small-scale cartographic representation of county locations. |
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The County_Gen feature class describes the generalized location and boundaries of the United States Counties and equivalent governmental units. It includes common identifiers for these entities so this data set can be used in conjunction with other data sets describing counties. This feature class is a US Forest Service Standard Reference Dataset and is the preferred spatial representation of counties for use by the US Forest Service. Since it is a generalized layer, it should only be used for small-scale cartographic representation of county locations. |
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5000 |
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[] |
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<DIV STYLE="text-align:Left;"><DIV><P><SPAN>The County_Gen feature class is a generalized spatial representation of the United States Counties and equivalent governmental units. The data are an extract of the Census codes and boundaries from the following Census FTP site: ftp://ftp2.census.gov/geo/tiger/TIGER2015/. Since the Census data do not include the coastline detail, the coastal boundaries have been included through a spatial erase using the Census Hydrography data from the Census FTP site: ftp://ftp2.census.gov/geo/tiger/TIGER2015/AREAWATER/. After erasing the coastline, the data was generalized using the ESRI Simplify Polygon function. The County_Gen feature class is a US Forest Service Standard Reference Dataset and is the preferred spatial representation of counties. This feature class should be used for small-scale cartographic products. The purpose of the generalized County_Gen dataset is to improve map display and drawing performance in both ArcGIS applications and ArcGIS Server map services. To satisfy both performance improvement and geometry representation, the following parameters and geoprocessing method were used. Simplify the input features using the Douglas-Peucker simplification algorithm with a specified maximum offset tolerance of 375 meters. The output features will contain a subset of the original input vertices. Min scale refers to what scale the layer turns off when zooming out. Max scale refers to the scale the layer turns off at when zooming in. Min scale: 0, no minimum scale set, Max Scale: 1:4622325.</SPAN></P></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><P><SPAN>The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution. The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly.</SPAN></P></DIV></DIV> |
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| title:
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S_USA.BdyDesg_County_Gen |
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| tags:
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["United States counties","boundaries","US Counties","county","United States of America"] |
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en-US |
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| minScale:
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150000000 |
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