Service Description: This coverage was created as part of an effort to update and augment the ease of use of the United States Geological Survey (USGS) Digital Line Graph - Hydrography Layer. It will be used as one input in the general updating of this information by the USGS.
Service ItemId: 0efdbfd6a8f8454286bb5e12258ad0b1
Has Versioned Data: false
Max Record Count: 2000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: False
Supports Shared Templates: True
All Layers and Tables
Layers:
Description: This is a statewide digital version of the Hydrography layer of the published USGS 1:24OOO-scale topographic map series. It was created from DLG files of each scanned 7.5-minute quad map, using custom ARC/INFO software routines which did the following steps: convert from DLG format to coverage format project from UTM to StatePlane map projection rubbersheet map sheet corners to exact computed quad-corner coordinates run semi-automated Edgematching procedure which joins hydrography lines along the quad edges, using distance-offset (maximum of 100 feet) and attribute-match criteria to determine which lines to join. merge the individual quad coverages and dissolve the quad-edge lines Processing was done using Double Precision coordinates and math, with processing tolerance (Fuzzy) of 1 foot. In the Database/Dataset Section the items CMAJOR and CMINOR represent coded pairs and are documented together. Up to five pairs in the pat and four pairs in the aat may be present. These will be appear in the tables as CMAJOR1 CMINOR1 CMAJOR2 CMINOR2, etc. The layer has been provided in both shape file and coverage format. In the case of the shape file separate shape files are provided for point, line, and polygon data. In the coverage format the line and polygon data is combined in one coverage. The shape files will be the choice of most users due to speed of drawing issues. Those users desiring to manipulate the original data may want to use the coverage format. All shapefiles have been combined for simplicities sake into one self extracting zip file which expands to about 500 megabytes. However, the value listed in the file size parameter of the metadata represents only the size of the particular shapefile being documented. Also it should be noted that the coverages contain redefined items which of necessity had to be split into separate items or omitted in the shape files because this option isn't available in shapefiles. This layer documentation is for the Shapefile which includes line features.
Copyright Text:
Spatial Reference: 32023 (32023)
Initial Extent:
XMin: 1246432.00898142
YMin: 275552.367168488
XMax: 1657314.99951607
YMax: 620675.938688211
Spatial Reference: 32023 (32023)
Full Extent:
XMin: 1341672.81872742
YMin: 284944.749935344
XMax: 1582980.80920759
YMax: 585163.007437259
Spatial Reference: 32023 (32023)
Units: esriFeet
Child Resources:
Info
SharedTemplates
Supported Operations:
Query
ConvertFormat
Get Estimates