20230103
13194300
1.0
FALSE
CONTOURS_24K_USGS_IN
file://\\4WP4WT3\C$\Users\SBarre\OneDrive - State of Indiana\MyProjects\EnterpriseMigration\GIO_SBarre\SDE\Contours_24K.gdb
Local Area Network
403589.443300
692082.039900
4181060.669000
4625465.902800
1
002
Projected
GCS_North_American_1983
Linear Unit: Meter (1.000000)
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS["NAD_1983_UTM_Zone_16N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-87.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",26916]]</WKT><XOrigin>-5120900</XOrigin><YOrigin>-9998100</YOrigin><XYScale>10000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>2</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>26916</WKID><LatestWKID>26916</LatestWKID></ProjectedCoordinateSystem>
NAD_1983_UTM_Zone_16N
Clip C:\GDBExtractServer\Output\Staged\Contours\SPG1144\ELEV_Indianapolis_E_IN_1X1_temp.gdb\Elev_Contour C:\GDBExtractServer\Output\Staged\Contours\SPG1144\ELEV_Indianapolis_E_IN_1X1_temp.gdb\clippoly C:\GDBExtractServer\Output\Staged\Contours\SPG1144\ELEV_Indianapolis_E_IN_1X1_temp.gdb\Elevation\Elev_Contour_clip #
Rename C:\GDBExtractServer\Output\Staged\Contours\SPG1144\ELEV_Indianapolis_E_IN_1X1_temp.gdb\Elevation\Elev_Contour_clip C:\GDBExtractServer\Output\Staged\Contours\SPG1144\ELEV_Indianapolis_E_IN_1X1_temp.gdb\Elev_Contour FeatureClass
Project C:\GIS\Data\USGS_24k_Contours\ELEV_Indianapolis_E_IN_1X1_GDB.gdb\Elevation\Elev_Contour C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_UTM.gdb\Indianapolis_E PROJCS['NAD_1983_UTM_Zone_16N',GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]],PROJECTION['Transverse_Mercator'],PARAMETER['False_Easting',500000.0],PARAMETER['False_Northing',0.0],PARAMETER['Central_Meridian',-87.0],PARAMETER['Scale_Factor',0.9996],PARAMETER['Latitude_Of_Origin',0.0],UNIT['Meter',1.0]] # GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]] PRESERVE_SHAPE # NO_VERTICAL
Append Indianapolis_W_Clip;Belleville_E_Clip;Cincinnati_E_Clip;Cincinnati_W;Chicago_W_Clip;Chicago_E_Clip;Danville_E;Danville_W_Clip;Evansville_E_Clip;Evansville_W_Clip;Fort_Wayne_E_Clip;Louisville_E_Clip;Louisville_W_Clip;Muncie_E_Clip;Muncie_W;Paducah_E_Clip;Vincennes_W_Clip;Vincennes_E_Clip;Fort_Wayne_W_Clip Indianapolis_E "Input schema must match target schema" # # #
AddField Indianapolis_E ELEV "Long (large integer)" # # # # NULLABLE NON_REQUIRED #
AddField Indianapolis_E SINK Text # # 3 # NULLABLE NON_REQUIRED #
CalculateField Indianapolis_E ELEV !ContourElevation! "Python 3" #
CalculateField "Indianapolis_E selection" SINK "YES" "Python 3" #
FeatureClassToFeatureClass C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM "Database Connections\GIO_Library2_EDITS.sde" CONTOURS_24K_USGS_IN # "Permanent_Identifier "Permanent_Identifier" true true false 40 Text 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Permanent_Identifier,-1,-1;Source_FeatureID "Source_FeatureID" true true false 40 Text 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Source_FeatureID,-1,-1;Source_DatasetID "Source_DatasetID" true true false 40 Text 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Source_DatasetID,-1,-1;Source_DataDesc "Source_DataDesc" true true false 100 Text 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Source_DataDesc,-1,-1;Source_Originator "Source_Originator" true true false 130 Text 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Source_Originator,-1,-1;Data_Security "Data_Security" true true false 2 Short 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Data_Security,-1,-1;Distribution_Policy "Distribution_Policy" true true false 4 Text 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Distribution_Policy,-1,-1;LoadDate "LoadDate" true true false 8 Date 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,LoadDate,-1,-1;FCode "FCode" true true false 4 Long 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,FCode,-1,-1;ContourElevation "ContourElevation" true true false 8 Double 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,ContourElevation,-1,-1;ContourUnits "ContourUnits" true true false 4 Long 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,ContourUnits,-1,-1;ContourInterval "ContourInterval" true true false 8 Double 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,ContourInterval,-1,-1;NEDResolution "NEDResolution" true true false 8 Double 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,NEDResolution,-1,-1;Cell_ID "Cell_ID" true true false 4 Long 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Cell_ID,-1,-1;Shape_Length "Shape_Length" false true true 8 Double 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,Shape_Length,-1,-1;ELEV "ELEV" true true false 4 Long 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,ELEV,-1,-1;SINK "SINK" true true false 3 Text 0 0 ,First,#,C:\GIS\Data\USGS_24k_Contours\ELEV_24K_2019_Indiana.gdb\CONTOURS_24K_USGS_IN_UTM,SINK,-1,-1" #
20230114
08435500
20230114
08435500
50000
5000
FGDC
CONTOURS_24K_USGS_IN
Feature Class
781763
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
SHAPE
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
Permanent_Identifier
Permanent_Identifier
String
40
0
0
Source_FeatureID
Source_FeatureID
String
40
0
0
Source_DatasetID
Source_DatasetID
String
40
0
0
Source_DataDesc
Source_DataDesc
String
100
0
0
Source_Originator
Source_Originator
String
130
0
0
Data_Security
Data_Security
SmallInteger
2
0
0
Distribution_Policy
Distribution_Policy
String
4
0
0
LoadDate
LoadDate
Date
8
0
0
FCode
FCode
Integer
4
0
0
ContourElevation
ContourElevation
Double
8
0
0
ContourUnits
ContourUnits
Integer
4
0
0
ContourInterval
ContourInterval
Double
8
0
0
NEDResolution
NEDResolution
Double
8
0
0
Cell_ID
Cell_ID
Integer
4
0
0
ELEV
ELEV
Integer
4
0
0
SINK
SINK
String
3
0
0
SHAPE_Length
SHAPE_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
U.S. Geological Survey, National Geospatial Technical Operations Center
1-888-ASK-USGS (1-888-275-8747)
Box 25046 Denver Federal Center
Lakewood
CO
80225
http://www.usgs.gov/ask/
Monday through Friday 8:00 AM to 4:00 PM
Metadata information can also be obtained through online services using The National Map Viewer, at http://nationalmap.usgs.gov or EarthExplorer, at http://earthexplorer.usgs.gov or Ask USGS at http://www.usgs.gov/ask.
20230114
ArcGIS Metadata
1.0
U.S. Geological Survey, National Geospatial Technical Operations Center
1-888-ASK-USGS (1-888-275-8747)
Box 25046 Denver Federal Center
Lakewood
CO
80225
http://www.usgs.gov/ask/
Monday through Friday 8:00 AM to 4:00 PM
Metadata information can also be obtained through online services using The National Map Viewer, at http://nationalmap.usgs.gov or EarthExplorer, at http://earthexplorer.usgs.gov or Ask USGS at http://www.usgs.gov/ask.
None
FileGDB
10.1
No compression applied
Spatial objects with unique identifiers and coordinate data.
180886588
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Indianapolis_E_IN_1X1_GDB.zip
File Geodatabase Feature Class
CONTOURS_24K_USGS_IN
2019-06-24
U.S. Geological Survey, National Geospatial Program
U.S. Geological Survey
Reston, VA
vector digital data
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>10-foot elevation contours for the extent of the state of Indiana, created from downloading, projecting and combining several datasets from USGS based on 7.5-minute quadrangle boundaries. These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation. Description from the original source metadata: These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.</SPAN></P><P><SPAN /></P><P><SPAN>Source files downloaded from The National Map on 11/18/2019:</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Muncie_W_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Danville_E_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Vincennes_E_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Louisville_W_KY_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Cincinnati_W_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Indianapolis_E_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Fort_Wayne_W_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Chicago_E_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Indianapolis_W_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Danville_W_IL_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Vincennes_W_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Chicago_W_IL_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Cincinnati_E_OH_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Muncie_E_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Louisville_E_KY_1X1_GDB.zip </SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Fort_Wayne_E_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Evansville_E_IN_1X1_GDB.zip</SPAN></P><P><SPAN>https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Evansville_W_IN_1X1_GDB.zip</SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
10-foot elevation contours for the extent of the state of Indiana, created from downloading, projecting and combining several datasets from USGS based on 7.5-minute quadrangle boundaries. Summary from the original source metadata: This dataset represents variant packaging of USGS elevation data. The primary USGS elevation products are gridded elevation points; contours are derived from these data for standard contour maps, and these contour data are also published as GIS vectors. Contours are typically a means of representing elevations for human visualization on maps, and are never more accurate than the gridded elevation data they are derived from.
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Indianapolis_E_IN_1X1_GDB.jpg
Thumbnail JPG image
JPEG
Geographic Names Information System
Indiana
Geographic Names Information System
United States
US
Geospatial Platform
National Elevation Dataset (NED) 1/3 arc-second - Contours
ngda
Elevation Terrestrial
1 x 1 degree
FileGDB 10.1
ISO 19115 Topic Category
elevation
National Elevation Dataset (NED) 1/3 arc-second - Contours
ngda
Elevation Terrestrial
1 x 1 degree
United States
elevation
No liability for content or accuracy is presumed by USGS for data.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data.</SPAN></P></DIV></DIV></DIV>
publication date
1999-01-01
2012-01-01
0.000000
0.000000
-86.9999999999999
-85.9999999999999
39.0000000000001
40.0000000000001
0.000000
0.000000
Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362
1
-88.160048
-84.689475
41.781041
37.756710
State of Indiana
USGS
Mike Martin
Indiana Department of Natural Resources
Agency GIS Coordinator
402 W Washington Street Room 280
Indianapolis
IN
46204
mmartin@dnr.in.gov
US
317-232-4068
U.S. Geological Survey, National Geospatial Technical Operations Center
1-888-ASK-USGS (1-888-275-8747)
Box 25046 Denver Federal Center
Lakewood
CO
80225
http://www.usgs.gov/ask/
Monday through Friday 8:00 AM to 4:00 PM
Metadata information can also be obtained through online services using The National Map Viewer, at http://nationalmap.usgs.gov or EarthExplorer, at http://earthexplorer.usgs.gov or Ask USGS at http://www.usgs.gov/ask.
U.S. Geological Survey, National Geospatial Technical Operations Center
20190216
Last metadata review date: 20180216
The National Elevation Dataset is seamless. Although the data accuracy varies, the data generally have high enough resolution and accuracy to support consistent and accurate contours at 1:24,000 scale.
The National Elevation Dataset is national in scope, with complete coverage of the conterminous 48 states, Hawaii, the US Virgin Islands and Puerto Rico. There is partial coverage for Alaska.
Lines of constant elevation are derived from the USGS 3D Elevation Program using automated processes. The contours are designed for visual clarity at 1:24,000 scale and a quadrangle-specific contour interval.
Contours do not have well-defined position, so National Map Accuracy Standards (NMAS) for horizontal accuracy do not apply. Contour positions are, on average, accurate to within one-half contour interval
The most recently published figure of overall absolute vertical accuracy of the 3DEP within the conterminous US, expressed as the root mean square error (RMSE) of 25,310 reference points is 1.55 meters. However, the vertical accuracy actually varies significantly across the US because of differences in source quality, terrain relief, land cover, and other factors. Details of this analysis are published in "Accuracy Assessment of the U.S. Geological Survey National Elevation Dataset, and Comparison with Other Large-Area Elevation Dataset-SRTM and ASTER: U.S. Geological Survey Open-File Report 2014-1008," http://pubs.usgs.gov/of/2014/1008/.
Files downloaded from The National Map on 11/18/2019 and used in this process:
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Muncie_W_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Danville_E_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Vincennes_E_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Louisville_W_KY_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Cincinnati_W_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Indianapolis_E_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Fort_Wayne_W_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Chicago_E_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Indianapolis_W_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Danville_W_IL_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Vincennes_W_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Chicago_W_IL_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Cincinnati_E_OH_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Muncie_E_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Louisville_E_KY_1X1_GDB.zip https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Fort_Wayne_E_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Evansville_E_IN_1X1_GDB.zip
https://prd-tnm.s3.amazonaws.com/StagedProducts/Contours/GDB/ELEV_Evansville_W_IN_1X1_GDB.zip
24000
Hypsography
Hypsography
2019-06-24
U.S. Geological Survey, National Geospatial Technical Operations Center - National Elevation Dataset is a component of a comprehensive base geospatial data model.
Vector digital data
This contour featureclass was generated from the 1/3 arc-second version of the 3D Elevation Program. The intended viewing scale for these features is 1:24,000. The contours are derived from a filtered elevation raster to achieve smoother arcs. In some areas, the 3DEP data may be modified by the National Hydrography Dataset (NHD) flow lines and water bodies to facilitate improved integration between the hypsography and hydrography on USGS map products. These contours were generated primarily for use as a layer in GeoPDFs created in the digital mapping program. The raster data source of contours is the 3D Elevation Program 1/3 arc-second layer. Secondary datasets include the high resolution flow lines, water bodies, and areas from the National Hydrography Dataset (NHD). The NHD layers are used in hydro-enforcement of the DEM prior to contour generation. The goals of the hydro-enforcement are to prevent contour lines from extending over the surface of water bodies and to align the contour reentrants with the NHD single- line streams. The 3DEP raster cells are converted to points. Those points, along with the NHD flow lines are input into an interpolation tool to create a new surface. The NHD water bodies and areas are preprocessed to attach the minimum and maximum elevation to each polygon. From these precalculated values, an appropriate value is calculated by which to raise the elevation cells under the NHD polygons. The NHD polygons are then converted into rasters, which in turn will be used to generate a mosaic that includes the new raster surface. The mosaic is filtered to provide smoother contour lines. Contours are generated and depression and index contours are identified. There is no guarantee or warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since these data were collected and generated and that some parts of these data may no longer represent actual surface conditions. Hydro-enforcement and generalization can also significantly alter the spatial characteristics of the contours. Users should not use these data for critical applications without a full awareness of its limitations.
http://Hs.gov/
publication date
This dataset was created by downloading, projecting and combining several datasets from USGS based on 7.5-minute quadrangle boundaries.The process: 1. Download the files from the National Map
2. Extract the file geodatabases for each 7.5-minute quad
3. Reproject each feature class from geographic to UTM Zone16N NAD83
4. Merge all of the feature classes together using Append
5. To match existing dataset, added ELEV field and calculated from ContourElevation.
6. To match existing dataset, added SINK field and calculated as "YES" for each FCODE with Depession.
Contour lines are created from USGS gridded elevation data, using automated and semi-automated processes, followed by limited visual inspection to verify quality, and occasionally editing to improve contour readability and registration with water features in the National Hydrography Dataset. Software is ArcGIS based, with some USGS customization.
2019-06-24
dataset
EPSG
6.13(3.0.1)
781763
Simple
FALSE
781763
TRUE
FALSE
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