U.S. Environmental Protection Agency (USEPA) and the U.S. Geological Survey (USGS). 2005 1.0 vector digital data withheld CAR_NHDPLUS_HYD The NHDPlus Version 1.0 is an integrated suite of application-ready geospatial data sets that incorporate many of the best features of the National Hydrography Dataset (NHD) and the National Elevation Dataset (NED). The NHDPlus includes a stream network (based on the 1:100,000-scale NHD), improved networking, naming, and "value-added attributes" (VAA's). NHDPlus also includes elevation-derived catchments (drainage areas) produced using a drainage enforcement technique first broadly applied in New England, and thus dubbed "The New-England Method". This technique involves "burning-in" the 1:100,000-scale NHD and when available building "walls" using the national Watershed Boundary Dataset (WBD). The resulting modified digital elevation model (HydroDEM) is used to produce hydrologic derivatives that agree with the NHD and WBD. An interdisciplinary team from the U. S. Geological Survey (USGS), U.S. Environmental Protection Agency (USEPA), and contractors, over the last two years has found this method to produce the best quality NHD catchments using an automated process. The VAAs include greatly enhanced capabilities for upstream and downstream navigation, analysis and modeling. Examples include: retrieve all flowlines (predominantly confluence-to-confluence stream segments) and catchments upstream of a given flowline using queries rather than by slower flowline-by-flowline navigation; retrieve flowlines by stream order; subset a stream level path sorted in hydrologic order for stream profile mapping, analysis and plotting; and, calculate cumulative catchment attributes using streamlined VAA hydrologic sequencing routing attributes. The VAAs include results from the use of these cumulative routing techniques, including cumulative drainage areas, precipitation, temperature, and land cover distributions. Several of these cumulative attributes are used to estimate mean annual flow and velocity as part of the VAAs. NHDPlus contains a snapshot (2005) of the 1:100,000-scale NHD that has been extensively improved. While these updates will eventually make their way back to the central NHD repository at USGS, this will not have happened prior to distribution of NHDPlus because the update process for the central NHD repository is still in development. Consequently, the NHDPlus will contain some temporary database keys and, as a result, NHDPlus users may not make updates to the NHD portions of NHDPlus with the intent of sending these updates back to the USGS. Once the NHDPlus updates have been posted to the central NHD repository, a fresh copy of the improved data can be downloaded from the central NHD repository and that copy will be usable for data maintenance. Note that the NHDPlus products are tightly integrated and user modifications to the underlying NHD can compromise this synchronization. The geospatial data sets included in NHDPlus are intended to support a variety of water-related applications. They already have been used in an application to develop estimates of mean annual streamflow and velocity for each NHD flowline in the conterminous United States. The results of these analyses are included with the NHDPlus data. A water-quality model developed by the U.S. Geological Survey (USGS) called SPARROW (Spatially Referenced Regressions on Watershed Attributes), can utilize the NHDPlus network functionality to track the downstream transport of nutrients, sediments, or other substances. NHDPlus water bodies and estimates of streamflow and velocity are used in SPARROW to identify reservoir retention and in-stream loss factors. NHDPlus climatic and land surface attributes can be used in SPARROW to identify potential factors in the delivery of nutrients from the land surface to streams. NHDPlus land cover information is useful for SPARROW in determining potential sources of nutrients. NHDPlus data is also being used in select areas for a USGS Web-based application, called StreamStats. StreamStats provides tools to interactively select any point on the NHDPlus to obtain streamflow and watershed characteristics for the selected point. NHDPlus has been designed to accommodate many users needs for future applications. NHDPlus provides the framework and tools necessary to customize the behavior of the network relationships as well as building upon the attribute database, for which the user can assign its own data to the network. These data are in the process of being rectified to the Sonoma Veg Map project's LiDAR. Wherever possible features are being rectified to the stream channel as shown on the bare earth hydro flattened Hill shade. In some cases the LiDAR was unable to penetrate the stream over canopy and in these cases a best guess is made. Such cases are noted on a feature by feature basis. This is a work in progress and subsequent reviews of flow models show possible errors in both the flow model and this dataset. For more information, refer to the NHDPlus Users Guide. en 2005 publication date Complete Irregular -123.535427 -122.349300 38.870199 38.102165 6124487.791506 6461158.474791 1802680.653487 2078926.196796 none Stream / River Lake / Pond Canal / Ditch Reservoir Spring / Seep Swamp / Marsh Artificial Path Reach Watershed Catchment EARTH SCIENCE Land Surface Topography Cartography GEODATA GIS USGS EPA Elevation Land Cover National Land Cover Dataset NLCD National Elevation Dataset NED National Hydrography Dataset NHD NHDPlus Stream flow Stream velocity Spatially Referenced Regressions on Watershed Attributes SPARROW StreamStats Water-quality Hydrologic modeling River Coding Systems Hydrography ISO 19115 Topic Category inlandWaters United States of America United States USA Alabama Arizona Arkansas California Colorado Connecticut Deleware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming None. None. Acknowledgement of the originating agencies (USEPA and USGS) would be appreciated in products derived from these data. U.S. Environmental Protection Agency waters_support@epa.gov ESRI ArcCatalog 9.3.1.3500 Feature Class U.S. Geological Survey (USGS) and the U.S. Environmental Protection Agency (USEPA) none none vector digital data http://nhd.usgs.gov 1:100,000 2005 The source NHD is a snapshot of the dataset accessed on 1/31/2004 and updated throughout 2004 and 2005. NHD A snapshot of the NHD was used as the baseline framework from which enhancements to the network were built upon. Enhancements include feature names, network connectivity and network flow relationships. This enhanced NHD version was then used in conjunction with the NED, and WBD (where applicable) to create a HydroDEM, for generation of the catchment Grid/shapefile, and flow direction/accumulation Grids. The enhanced NHD was used to compute and assign flowline Value Added Attributes (VAAs) to this network. U.S. Geological Survey (USGS), EROS Data Center 1999 raster digital data Sioux Falls, SD U.S. Geological Survey http://ned.usgs.gov/ June 10, 2004 Date data was accessed NED NED data used in combination with NHD, WBD (where applicable) to create a HydroDEM, to generate NHDPlus Catchments, surface flow direction and accumulation Grids. Stream elevations from NED which were used to help derive stream slope and stream velocity. U.S. Geological Survey (USGS) 19990525 1 raster digital data Sioux Falls, SD U.S. Geological Survey http://landcover.usgs.gov/natllandcover.php early 1990's mid 1990's ground condition NLCD 1992 Source dataset used to assign catchment and flowline land cover attributes. Chris Daly and George Taylor of the Spatial Climate Analysis Service at Oregon State University. 200008 raster digital data Corvallis, Oregon, USA Spatial Climate Analysis Service at Oregon State University (SCAS/OSU) This dataset from the PRISM model, developed by Chris Daly of SCAS/OSU. http://www.ocs.orst.edu/prism/ 19610101 19901231 Climatological period from which the point observations were taken. Source dataset used to compute mean annual precipitation for each catchment and area weighted precipitation for each flowline. Weighted precipitation values for each flowline was used as a variable in a Vogel equation for estimating mean annual streamflow. The Vogel estimates of mean annual flow were used as a source variable in a Jobson equation to compute mean annual stream velocity estimates. Chris Daly and George Taylor of the Spatial Climate Analysis Service at Oregon State University. 200008 1 raster digital data Corvallis, Oregon, USA Spatial Climate Analysis Service at Oregon State University (SCAS/OSU) This dataset from the PRISM model, developed by Chris Daly of SCAS/OSU. http://www.ocs.orst.edu/prism/ 19610101 19901231 Climatological period from which the point observations were taken. Source dataset used to compute mean annual temperature for each catchment and area weighted mean annual temperature for each flowline. Weighted mean annual temperature values for each flowline was used as a variable in a Vogel equation for estimating mean annual streamflow. The Vogel estimates of mean annual flow were used as a source variable in a Jobson equation to compute mean annual stream velocity estimates. U.S. Department of Agriculture, Natural Resources Conservation Service (NRCS) and the U.S. Geological Survey (USGS) multiple dates vector digital data Only certified WBD was included for use in HydroDEM production. These data are tiled by U.S. State, therefore only selected states with full certification were used. The publication date for each state's WBD varies. (See Source Time Period of Content) http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/ 1:24,000 Alabama, 2004 Connecticut, 2001 Georgia, 2003 Illinois, 2002 Massachusetts, 2001 Maryland, 2003 New Hampshire, 2001 Utah, 2003 Vermont, 2003 Wyoming, 2002 publication dates WBD 12-digit subwatershed divides from the Watershed Boundary Dataset (WBD) were used (for states where certified WBD was available) as a ridgeline enforcment factor in a process called "walling" in the production of HydroDEMs. The HydroDEMs are the source data from which NHD Catchments are delineated from. Catchments with coincident boundaries with the WBD are in conformance with the WBD. NHDPlus Flow Direction and Accumulation Grids are hydrologic derivative products of the HydroDEMs. David W. Stewart, Alan Rea and David M. Wolock April 2006 vector digital data Data Series DS-195 Reston, Va U.S. Geological Survey http://water.usgs.gov/GIS/metadata/usgswrd/XML/streamgages.xml April 20, 2004 Date of data extract from NWIS Location of gages were spatially referenced to the NHDPlus flowlines to create a gaging station point event table, where for each gage in the database, the corresponding NHD Reachcode and measure are recorded. An early version of the dataset was also used for the QA/QC of NHDPlus cumulative drainage areas and estimates of mean annual stream flow. Metadata imported. withheld 20120313 08194200 Dataset copied. withheld 20120809 15072500 Dataset copied. withheld 20130321 08280200 Dataset copied. withheld 20130321 08573200 U.S. Environmental Protection Agency waters_support@epa.gov Although this data set has been used by the U.S. Government, no warranty expressed or implied is made by the U.S. Government as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Government in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. .zip Provide website/ftp address to download data here Downloadable Data 20120313 en FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time REQUIRED: The person responsible for the metadata information. REQUIRED: The organization responsible for the metadata information. REQUIRED: The mailing and/or physical address for the organization or individual. REQUIRED: The city of the address. REQUIRED: The state or province of the address. REQUIRED: The ZIP or other postal code of the address. REQUIRED: The telephone number by which individuals can speak to the organization or individual. 20210303 13364800 FALSE 20210930 13004300 20210930 13005300 HYD_STRM_LiDAR_100K 002 6124286.768942 6461184.620408 1802488.737861 2078888.224431 1 0.000 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_California_II_FIPS_0402_Feet <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/10.7'><WKT>PROJCS[&quot;NAD_1983_StatePlane_California_II_FIPS_0402_Feet&quot;,GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Lambert_Conformal_Conic&quot;],PARAMETER[&quot;False_Easting&quot;,6561666.666666666],PARAMETER[&quot;False_Northing&quot;,1640416.666666667],PARAMETER[&quot;Central_Meridian&quot;,-122.0],PARAMETER[&quot;Standard_Parallel_1&quot;,38.33333333333334],PARAMETER[&quot;Standard_Parallel_2&quot;,39.83333333333334],PARAMETER[&quot;Latitude_Of_Origin&quot;,37.66666666666666],UNIT[&quot;Foot_US&quot;,0.3048006096012192],AUTHORITY[&quot;EPSG&quot;,2226]]</WKT><XOrigin>-115211800</XOrigin><YOrigin>-93821500</YOrigin><XYScale>3048.0060960121918</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-1023.7418235</MOrigin><MScale>10000</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102642</WKID><LatestWKID>2226</LatestWKID></ProjectedCoordinateSystem> 1.0 FGDC CSDGM MetadataVerify - ISD GIS 50000 5000 FGDC Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595 LiDAR Streams 100K 2016-12-13T00:00:00 Source date for majority of the data is Spring 2013 20130501 external 7e13766397058ac82a3bd46c716b24a GIS Manager County of Sonoma 2615 Paulin Dr Santa Rosa CA 95403 ISD-ServiceDesk@sonoma-county.org US (707)565-2030 M - F 8:00 am to 5:00 pm GIS Manager GIS Manager GIS Manager True GIS Manager 6124487.791506 6461158.474791 2078926.196796 1802680.653487 1 0.000000 0.000000 -123.535427 -122.3493 38.870199 38.102165 1 1 -123.536130 -122.349206 38.870095 38.101629 0.000000 0.000000 The original intent was to follow the drainage pattern and modify the location of the line work of the NHDPlus data while maintaining the original connectivity. However this was not always possible for the following reasons. 1. In two cases the line work provided by the USGS NHDPlus incorrectly crossed over a ridge into another watershed creating a stream connection that didn’t exist. In both cases the incorrect line work was corrected by removing the connection to the stream in the neighboring watershed and confining the incorrect segment to the correct watershed. 2. In several cases the configuration of the stream network was incorrect. In these cases the line work was altered to reflect current drainage patterns. In both cases new splits to the original line work had to be introduced to the data, which may render the data unsuitable for some of the USGS stated purposes. In some cases data from outside the scope of the Sonoma Veg Map LiDAR data coverage area was added where it provided a logical extension or connection to the stream network in the project area. In general these additions do not have the same spatial accuracy as the LiDAR derived data. The geospatial data sets included in NHDPlus are intended to support a variety of water-related applications. They already have been used in an application to develop estimates of mean annual streamflow and velocity for each NHD flowline in the conterminous United States. The results of these analyses are included with the NHDPlus data. A water-quality model developed by the U.S. Geological Survey (USGS) called SPARROW (Spatially Referenced Regressions on Watershed Attributes), can utilize the NHDPlus network functionality to track the downstream transport of nutrients, sediments, or other substances. NHDPlus water bodies and estimates of streamflow and velocity are used in SPARROW to identify reservoir retention and in-stream loss factors. NHDPlus climatic and land surface attributes can be used in SPARROW to identify potential factors in the delivery of nutrients from the land surface to streams. NHDPlus land cover information is useful for SPARROW in determining potential sources of nutrients. NHDPlus data is also being used in select areas for a USGS Web-based application, called StreamStats. StreamStats provides tools to interactively select any point on the NHDPlus to obtain streamflow and watershed characteristics for the selected point. NHDPlus has been designed to accommodate many users needs for future applications. NHDPlus provides the framework and tools necessary to customize the behavior of the network relationships as well as building upon the attribute database, for which the user can assign its own data to the network. These have been rectified to the Sonoma Veg Map project's LiDAR. Wherever possible features are being rectified to the stream channel as shown on the bare earth hydo Digital Elevation Model. In some cases the LiDAR was unable to penetrate the stream over canopy and in these cases a best guess is made. Such cases are noted on a feature by feature basis. <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The NHDPlus Version 1.0 is an integrated suite of application-ready geospatial data sets that incorporate many of the best features of the National Hydrography Dataset (NHD) and the National Elevation Dataset (NED). The NHDPlus includes a stream network (based on the 1:100,000-scale NHD), improved networking, naming, and "value-added attributes" (VAA's). NHDPlus also includes elevation-derived catchments (drainage areas) produced using a drainage enforcement technique first broadly applied in New England, and thus dubbed "The New-England Method". This technique involves "burning-in" the 1:100,000-scale NHD and when available building "walls" using the national Watershed Boundary Dataset (WBD). The resulting modified digital elevation model (HydroDEM) is used to produce hydrologic derivatives that agree with the NHD and WBD. An interdisciplinary team from the U. S. Geological Survey (USGS), U.S. Environmental Protection Agency (USEPA), and contractors, over the last two years has found this method to produce the best quality NHD catchments using an automated process. The VAAs include greatly enhanced capabilities for upstream and downstream navigation, analysis and modeling. Examples include: retrieve all flowlines (predominantly confluence-to-confluence stream segments) and catchments upstream of a given flowline using queries rather than by slower flowline-by-flowline navigation; retrieve flowlines by stream order; subset a stream level path sorted in hydrologic order for stream profile mapping, analysis and plotting; and, calculate cumulative catchment attributes using streamlined VAA hydrologic sequencing routing attributes. The VAAs include results from the use of these cumulative routing techniques, including cumulative drainage areas, precipitation, temperature, and land cover distributions. Several of these cumulative attributes are used to estimate mean annual flow and velocity as part of the VAAs. NHDPlus contains a snapshot (2005) of the 1:100,000-scale NHD that has been extensively improved. While these updates will eventually make their way back to the central NHD repository at USGS, this will not have happened prior to distribution of NHDPlus because the update process for the central NHD repository is still in development. Consequently, the NHDPlus will contain some temporary database keys and, as a result, NHDPlus users may not make updates to the NHD portions of NHDPlus with the intent of sending these updates back to the USGS. Once the NHDPlus updates have been posted to the central NHD repository, a fresh copy of the improved data can be downloaded from the central NHD repository and that copy will be usable for data maintenance. Note that the NHDPlus products are tightly integrated and user modifications to the underlying NHD can compromise this synchronization.</SPAN></P></DIV></DIV></DIV> USGS NHD Plus V1. Sonoma Veg Map. County of Sonoma ISD-GIS Stream / River Lake / Pond Canal / Ditch Reservoir Spring / Seep Swamp / Marsh Artificial Path Reach GEODATA GIS USGS National Hydrography Dataset NHD NHDPlus Stream flow Stream velocity Spatially Referenced Regressions on Watershed Attributes SPARROW StreamStats Water-quality Hydrologic modeling River Coding Systems Hydrography inlandWaters. <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-size:12pt">This is a work in progress and should no way be considered a final version. This is a DRAFT dataset until otherwise declared. In some cases the LiDAR was unable to penetrate the stream over canopy and in these cases a best guess is made. Such cases are noted on a feature by feature basis. This is a work in progress and subsequent reviews of flow models show possible errors in both the flow model and this dataset.</SPAN></P></DIV></DIV></DIV> external 7e13766397058ac82a3bd46c716b24a GIS Manager County of Sonoma 2615 Paulin Dr Santa Rosa CA 95403 ISD-ServiceDesk@sonoma-county.org US (707)565-2030 M - F 8:00 am to 5:00 pm GIS Manager GIS Manager GIS Manager True GIS Manager ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Feature Class Feature Class 0.000 Vector Simple FALSE 1571 TRUE TRUE GCS_North_American_1983 NAD_1983_StatePlane_California_II_FIPS_0402_Feet coordinate pair survey feet 0.000328 0.000328 North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Explicit elevation coordinate included with horizontal coordinates 0.000100 NAD_1983_StatePlane_California_II_FIPS_0402_Feet EPSG 5.3(9.0.0) 1571 HYD_STRM_LiDAR_100K Feature Class 1571 OBJECTID OBJECTID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. COMID COMID Integer 4 10 0 The common identifier (ComID) is a 10-digit integer value that uniquely identifies the occurrence of each NHD feature (including reaches). Each value occurs only once throughout the Nation. Once assigned, the value is associated permanently with its feature. When features are deleted or split or merged, their ComIDs are retired. The common identifier is stored in a data element named "COM_ID". ComIDs are different between medium resolution and high resolution. Changes to common identifiers are not tracked. USGS FDATE FDATE Date 8 0 0 Feature Currency Date NHDPlus Version 1 Users Guide RESOLUTION RESOLUTION String 7 0 0 NHD database resolution NHDPlus Version 1 Users Guide Medium GNIS_ID GNIS_ID String 10 0 0 Geographic Names Information System ID for the value in GNIS_Name NHDPlus Version 1 Users Guide GNIS_NAME GNIS_NAME String 65 0 0 Feature Name from the Geographic Names Information System NHDPlus Version 1 Users Guide LENGTHKM LENGTHKM Double 8 38 8 REACHCODE REACHCODE String 14 0 0 Reach Code assigned to feature NHDPlus Version 1 Users Guide FLOWDIR FLOWDIR String 15 0 0 Flow direction is "With Digitized" or "Uninitialized" Only flowlines with FlowDir = "With Digitized" are used to define the surface water network used in NHDPlus. All other flowlines are ignored by NHDPlus. NHDPlus Version 1 Users Guide WBAREACOMI WBAREACOMI Integer 4 10 0 ComID of the NHD Polygonal water feature through which a NHD "Artifical Path" flowline flows. NHDPlus Version 1 Users Guide FTYPE FTYPE String 24 0 0 NHD Feature Type NHDPlus Version 1 Users Guide FCODE FCODE Integer 4 10 0 Numeric codes for various feature attributes in the NHDFCode lookup table. NHDPlus Version 1 Users Guide SHAPE_LENG SHAPE_LENG Double 8 38 8 Feature length in decimal degrees NHDPlus Version 1 Users Guide ENABLED ENABLED String 6 0 0 Always "True" NHDPlus Version 1 Users Guide GRID_CODE GRID_CODE Double 8 38 8 Value field from Catchment Grid NHDPlus Version 1 Users Guide CUMDRAINAG CUMDRAINAG Double 8 38 8 Cumulative drainage area in square kilometers(sq km) at bottom of flowline. NHDPlus Version 1 Users Guide MAFLOWU MAFLOWU Double 8 38 8 Mean Annual Flow in cubic feet per second (cfs) at bottom of flowline as computed by Unit Runoff Method NHDPlus Version 1 Users Guide MAFLOWV MAFLOWV Double 8 38 8 Mean Annual Flow (cfs) at bottom of flowline using Vogel Method. NHDPlus Version 1 Users Guide MAVELU MAVELU Double 8 38 8 Mean Annual Velocity (fps) at bottom of flowline as computed by Jobson Method (1996) using the flow in MAFlowU. NHDPlus Version 1 Users Guide MAVELV MAVELV Double 8 38 8 Mean Annual Velocity (fps) at bottom of flowline as computed by Jobson Method (1996) using the flow in MAFlowV. NHDPlus Version 1 Users Guide INCRFLOWU INCRFLOWU Double 8 38 8 Incremental Flow (cfs) for Flowline as computed by the Unit Runoff Method NHDPlus Version 1 Users Guide MAXELEVRAW MAXELEVRAW Double 8 38 8 Maximum elevation (unsmoothed) in meters, populated only for headwater Flowlines, -9998 for all non-headwater Flowlines NHDPlus Version 1 Users Guide MINELEVRAW MINELEVRAW Double 8 38 8 Minimum elevation (unsmoothed) in meters NHDPlus Version 1 Users Guide MAXELEVSMO MAXELEVSMO Double 8 38 8 Maximum elevation (smoothed) in meters NHDPlus Version 1 Users Guide MINELEVSMO MINELEVSMO Double 8 38 8 Minimum elevation (smoothed) in meters NHDPlus Version 1 Users Guide SLOPE SLOPE Double 8 38 8 Slope of flowline (m/m) NHDPlus Version 1 Users Guide CHECK_ CHECK_ String 1 0 0 SOURCE SOURCE String 5 0 0 source of the data used to modify the features from its original NHDPlus configuration. County of Sonoma ISD GIS SVM Sonoma Veg Map LiDAR County of Sonoma ISD GIS PSVM Partial Sonoma Veg Map LiDAR County of Sonoma ISD GIS TREE Sonoma Veg Map LiDAR used, but tree canopy was too dense for a definative stream course. Location of feature accuracy is unknown. County of Sonoma ISD GIS UNG Stream is Underground. Sources Vary from georeferenced Engineering drawings to educated guesses. County of Sonoma ISD GIS MRK Merrick 2000 imagery. County of Sonoma ISD GIS DRG USGS Digital Raster Graphic scanned 1:24k topographic Map County of Sonoma ISD GIS Shape Shape Geometry 4 0 0 Feature geometry. ESRI Coordinates defining the features. NAME NAME String 50 0 0 SRCDATA SRCDATA String 10 0 0 Source Data County of Sonoma ISD GIS NHDPlus National Hydrologic Dataset Plus County of Sonoma ISD GIS USGS Sourced from the 1:24k USGS Streams Non NHDPlus County of Sonoma ISD GIS MOREINFO MOREINFO String 3 0 0 A field that indicates if a request for help on a final determination with regard to the stream is requested. A "Yes" so indicates. County of Sonoma ISD GIS last_edited_date last_edited_date Date 8 0 0 Most recent edit date. 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