20250613
08573700
1.0
FALSE
HYDRO_Ponds_2024
002
165792.964502
274495.380955
1701250.000041
1798073.371026
1
Projected
GCS_NAD_1983_2011
Linear Unit: Foot_US (0.304801)
NAD_1983_2011_StatePlane_Indiana_East_FIPS_1301_Ft_US
<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/3.5.0'><WKT>PROJCS["NAD_1983_2011_StatePlane_Indiana_East_FIPS_1301_Ft_US",GEOGCS["GCS_NAD_1983_2011",DATUM["D_NAD_1983_2011",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",328083.3333333333],PARAMETER["False_Northing",820208.3333333333],PARAMETER["Central_Meridian",-85.66666666666667],PARAMETER["Scale_Factor",0.9999666666666667],PARAMETER["Latitude_Of_Origin",37.5],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",6459]],VERTCS["NAVD88_height_(ftUS)",VDATUM["North_American_Vertical_Datum_1988"],PARAMETER["Vertical_Shift",0.0],PARAMETER["Direction",1.0],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",6360]]</WKT><XOrigin>-18119800</XOrigin><YOrigin>-45615400</YOrigin><XYScale>3048.0060960121928</XYScale><ZOrigin>-1000000</ZOrigin><ZScale>10000</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.0032808333333333331</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>103041</WKID><LatestWKID>6459</LatestWKID><VCSWKID>105703</VCSWKID><LatestVCSWKID>6360</LatestVCSWKID></ProjectedCoordinateSystem>
20260729
14434700
20260729
14434700
Jacob Mark
Dewberry Engineers Inc.
562-512-2143
1000 N Ashley Drive, Suite 801
Tampa
FL
33602
jmark@dewberry.com
20260113
ArcGIS Metadata
1.0
Joan Keene
Hamilton County GIS
317-776-8254
1 Hamilton County Square, Suite 63
Noblesville
IN
46060
US
Joan.Keene@hamiltoncounty.in.gov
None
Digital Data
https://geohub.hamiltoncounty.in.gov/
https://geohub.hamiltoncounty.in.gov
Enterprise Geodatabase Feature Class
Elevation-Derived Hydrography for Hamilton County, Indiana
2026-01-13
Hamilton County GIS
Dewberry Engineers, Inc.
vector digital data
This dataset is Elevation-Derived Hydrography (EDH) for Hamilton County located in Indiana. The EDH contains line features representing streams and rivers and polygons representing waterbodies. The EDH was derived from a 2-foot lidar-derived Digital Elevation Model (DEM), acquired in 2024. This dataset meets the requirements of the USGS Elevation-Derived Hydrography Data Acquisition Specifications (2023 rev. A2) and READ Rules. The line features contain Elevation Class (EClass) codes useful for hydro-enforcement, including culvert identification. Feature Class (FClass) and Feature Codes (FCodes) are hydrography codes compatible with the National Hydrography Dataset (NHD), now retired.
The purpose of this Elevation-Derived Hydrography (EDH) dataset is to support Hamilton County's geospatial, planning, and water resource management workflows with an accurate, current, and 3D-integrated hydrographic representation. The data were developed from high-resolution QL1 lidar in accordance with USGS 3D Hydrography Program (3DHP) specifications. This vector hydrography content improves upon historic NHD datasets by offering more spatially accurate flowlines and waterbody features derived directly from recent lidar elevation surfaces. The EDH dataset is being integrated with Hamilton County's existing inventories of Legal Drains, Storm Sewer Networks, and Wetlands to support advanced hydrologic modeling, drainage assessment, regulatory compliance, and infrastructure planning. It also supports flood risk analysis, watershed delineation, culvert and outfall mapping, and long-term environmental planning. Hamilton County plans to contribute the eight (8) complete HUC-12 areas in Hamilton County to the USGS National Geospatial Program (NGP) through the "USGS 3DNTM Data Collaboration Announcement (DCA)" for integration into the USGS 3D National Topographic Model (3DNTM).
Hamilton County GIS, Dewberry Engineers Inc., United States Geological Survey
Jacob Mark
Dewberry Engineers Inc.
Project Manager
562-512-2143
1000 N Ashley Drive, Suite 801
Tampa
FL
33602
jmark@dewberry.com
United States
Indiana
Hamilton County
05120201
inlandWaters
elevation
ISO 19115 Topic Category
hydrography
lidar
connector
indefinite surface connector
culvert
terrain breach
canal/ditch
dam/weir
lake/pond
stream/river
drainageway
artificial path
3DNTM
3DEP
QL1 Lidar
3DHP
EDH
USGS Program
inlandWaters
elevation
hydrography
lidar
connector
indefinite surface connector
culvert
terrain breach
canal/ditch
dam/weir
lake/pond
stream/river
drainageway
artificial path
3DNTM
3DEP
QL1 Lidar
3DHP
EDH
United States
Indiana
Hamilton County
05120201
None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the Hamilton County GIS Department would be appreciated for products derived from these data.
None. However, users are advised to read the EDH metadata thoroughly to understand appropriate use and data limitations. Users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of Hamilton County GIS would be appreciated for products derived from these data. See access and use constraints information on GeoHub.
No restrictions apply to these data.
ArcGIS Pro; Arc Hydro; Dewberry Proprietary Scripts and QA Tools
true
-86.2614570
-85.8433670
40.2347181
39.9176352
697.710000
898.140000
publication date
2023-12-21
2025-11-24
697.710000
898.140000
This task order involves the development of EDH products, including a complete hydrographic network and hydro-enforced DEMs for Hamilton County. The project area covers approximately 485 square miles of area in Indiana.
1
-86.247513
-85.857722
40.184798
39.917717
None.
None.
Attribute accuracy report contains information about ancillary data used to aid in attribution of features. The attributes were verified by comparison to the original National Hydrography Dataset attributes. Corrections to attribution are based, at the minimum, on elevation source data. All features contain attributes defined in the USGS Elevation-Derived Hydrography Data Acquisition Specifications and Elevation-Derived Hydrograhy-READ Rules.
All area and line features meet 3DHP topology rules. Points, nodes, lines, and areas conform to topological rules. Lines intersect only at nodes, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines where they are supposed to meet. There are no duplicate lines. Gaps and overlaps among areas do not exist. The EDH was compared to the lidar-source bare-earth Digital Elevation Model and channels present within the surface that meet minimum mapping requirements were added to the EDH. The EDH was compared to the original NHD for the study area and any feature from the NHD that did not have a channel representation in the DEM was not added to the EDH. Stream connectivity was checked and any isolated networks were verified using a Geomorphic Index (GMI) coincident with the DEM. Features without clear channels present in the DEM are allowed if needed for connectivity between upstream and downstream features and have been added as indefinite surface connectors.
The completeness of the data is relative to the DEM from which the EDH was derived, and must match the DEM. The goal of this product is to be vertically and horizontally integrated with the bare earth DEM. Published NHD is used as a guide for feature extraction and densification, but was not used as a source to verify the presence or absence of features.
All stream/river linear features have been placed within a channel of the bare earth DEM. Waterbody features have been placed at the limit or banks of the waterbody. All waterbody features were iteratively smoothed. Hydro-flattening is present in the source DEM, waterbodies and stream/river area features match the hydro-flattening breakline extent.
All features have z-values associated with every vertex. Waterbodies are flat, with a single z-value, at or just below the surface of the DEM at the edge of the polygon, assigned to all vertices. Linear features are flat or flow consistently downstream. Z-values are at, or just below, the surface of the DEM. Exceptions are allowed for connector features and features with no evidence of interaction, e.g. pipelines. Any other exceptions to vertical alignment, e.g. exceptions required to maintain monotonicity, are documented in the project report. There are 38 indefinite surface connectors and 38 connectors that are not monotonic and are attributed with a FlowClass of 2 to maintain connectivity.
Dewberry used a generalized 11-step workflow to derive high-resolution EDH products. We designed our hydrographic models to derive channelized features from the DEM that generally conform with the existing NHD features, density guidelines, and/or are supported by various derivative surface models, including geomorphons. The workflow incorporated components from Esri ArcGIS Pro with Arc Hydro, and proprietary scripting to produce flowlines, conflate the flowlines to the elevation model, assuring complete network connectivity and monotonicity, attributing the flowlines to meet required specifications, constructing FGDC-compliant metadata, and internally provide quality assurance. As part of our QA workflow, Esri ArcGIS Data Reviewer checks are used to validate the geometry. The workflow included: 1. Supplementing 3DEP breaklines by collecting additional features meeting EDH collection requirements but which were not collected as part of the original 3DEP Task Order. 2. Locate culvert and other flow-disrupting features. Specifically, to locate culverts for the AOI, Dewberry used the existing, hydro-flattened DEM and derived a preliminary flowline network using a flow accumulation threshold significantly larger than that used for high-resolution flowline extraction. This resulted in a generalized network of features that are most likely to be impacted by culverts. This network was manually reviewed against the DEM, GMI, orthoimagery, road network and government furnished stormwater data to identify culverts and other flow-disrupting features. 3. The newly compiled breaklines and culvert data were assessed with the existing breaklines and available culvert and storm drain data and then used to re-process a hydro-flattened DEM to construct a hydro-conditioned DEM for feature extraction. 4. Extracting flowlines, using a proprietary workflow, at a resolution to achieve the target density specification for the AOI. 5. Flowlines were filtered and thinned based on standard USGS 3DHP guidance along with Hamilton County specific guidance and criteria. 6. The resulting geometric flow network was topologically/cartographically smoothed, with small flowlines removed (pruned), and the remaining network examined for flow backups (dams). 7. Once the flow network was complete, Dewberry refined the artificial flow paths using proprietary techniques that are compatible with USGS specifications ensuring connectivity through waterbodies and depressions. These final lines were smoothed appropriately and thinned to meet project density guidelines. 8. Upon successful completion of all network connectivity checks, the DEM elevations were assigned to the flowlines and monotonicity was enforced. 9. The flowlines, flow paths, and waterbodies are attributed to 3DHP specifications. Flowlines were attributed as stream/river/canal/ditch or indefinite surface connector based on the Geomorphic Index raster developed using the USGS guidelines. 10. FGDC-compliant metadata were developed and checked using the USGS Metadata parser. 11. A final quality review was performed on datasets prior to delivery. This review includes a complete set of checklists that are reviewed by independent reviewers. Checks include, but are not limited to, a comprehensive review of the EDH flowlines for completeness, verification of connectivity (2D and 3D) and downstream flow to a single pour point via ArcGIS Pro Trace Network tools, review of differences between the EDH and existing NHD (including review of the omissions.gdb to ensure any omitted existing NHD features are not represented in the EDH and are acceptable as omissions), horizontal alignment within GMI channels, vertical alignment, within specified tolerances, between EDH vector data and source DEMs, monotonicity and various topology checks (2D and 3D). Lastly, all documentation is independently reviewed.
2025-09-30
3DEP OPR DEM, 3DEP breaklines, GMI, NHD, Local Storm Drain Inventories
As mentioned in steps 2 and 11 above, the GMI was utilized in conjunction with the DEM to identify channelized features and ensure horizontal alignment of EDH within GMI channels. The GMI raster was created by Dewberry using the USGS preferred model for GMI generation. First, the Feature Preserving Smoothing (FPS) tool is run in ArcGIS Pro to remove noise in the DEM. Next, the WhiteboxTools Multiscale Elevation Profile tool (now available in ArcGIS Pro) is used with the FPS raster as the input to measure the local topographic position of cells as a percentile range, and the lowest 10th percentile of the surface is extracted as an input to the GMI. Then, BotHat is used to filter the FPS raster based on two different neighborhood sizes of 3x3 and 11x11; the lowest elevation areas from the smaller 3x3 neighborhood that are also present within the 11x11 neighborhood are retained as channelized areas. Then the WhiteboxTools Geomorphons tool (now also available in ArcGIS Pro) is run with the FPS raster as the input DEM; the tool is run twice to create the geomorphon valley raster and geomorphon ridge raster. Last, WhiteboxTools D-Infinity flow direction and flow accumulation (now also available in ArcGIS Pro) steps are run on the FPS raster. The binary raster outputs from the four steps above are run in a tool to create the final GMI output. GMI values range from 0 (nodata) where no indicators are present, to 4 when all input rasters indicate a possible channel.
2025-09-30
3DEP OPR DEM
Bare-Earth Digital Elevation Model (DEM) used for generating point, line, and polygon vector water features; identifying flat water bodies; and populating z-values.
Hamilton County, Indiana 2024 Orthophotography and Lidar Basemap Project
DEM
2024-08-30
Dewberry
raster digital data
ground condition
2024-08-30
Originally delineated hydrography. Used as the guide for minimum set of features to capture for EDH.
National Hydrography Dataset (NHDPlus HR)
NHD
2019-02-08
USGS
vector digital data
USGS National Map
https://apps.nationalmap.gov/downloader/
ground condition
2019-02-08
Used to validate culvert placement.
Hamilton County, Indiana 2024 Orthophotography and Lidar Basemap Project
3-band orthoimagery
2024-08-01
Dewberry
remote-sensing image
ground condition
2024-08-01
68
Hydrographic features collected as part of this AOI were generated, processed, and attributed according to USGS Elevation-Derived Hydrography Data Acquisition Specifications (2023 rev. A2) and READ Rules which is available online at https://www.usgs.gov/ngp-standards-and-specifications/elevation-derived-hydrography-data-acquisition-specifications.
USGS Elevation-Derived Hydrography Data Acquisition Specifications (2023 rev. A2) and READ Rules which is available online at https://www.usgs.gov/ngp-standards-and-specifications/elevation-derived-hydrography-data-acquisition-specifications.
HYDRO_Ponds_2024
Feature Class
68
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Comments
Comments
String
250
0
0
Desc_
Desc
String
250
0
0
EClass
EClass
SmallInteger
2
5
0
FClass
FClass
SmallInteger
2
5
0
Limitation
Limitation
SmallInteger
2
5
0
Method
Method
String
250
0
0
Source
Source
String
128
0
0
UniqueID
UniqueID
String
50
0
0
UserCode
UserCode
String
25
0
0
FCode
FCode
Integer
4
10
0
Shape
Shape
Geometry
8
0
0
Feature geometry.
Esri
Coordinates defining the features.
Shape.STArea()
Shape.STArea()
Double
0
0
0
Shape.STLength()
Shape.STLength()
Double
0
0
0
Stream/river
46000
Lake/pond
39000
Sea/ocean
44500
Dam/weir
34300
User-defined feature
0
EClass
EClass
A short integer one-digit code indicating whether a feature is not used for elevation derivatives; used for hydroflattening or for other nonspecified elevation purposes; used for hydroflattening; or an elevation dataset limitation feature.
Coded Value
Default value
Default value
DBO
SmallInteger
FClass
FClass
A short integer one-digit code defining whether a feature is intended for use as an NHD feature (1, will be used for conflation), a non-NHD feature (2, outside of the collection criteria and not intended to be used for conflation), or a nonhydrography feature (3, elevation dataset limitation).
Coded Value
Default value
Default value
DBO
SmallInteger
Playa
36100
Canal/ditch
33600
Ice mass
37800
EClass
EClass
A short integer one-digit code indicating whether a feature is not used for elevation derivatives; used for hydroflattening or for other nonspecified elevation purposes; used for hydroflattening; or an elevation dataset limitation feature.
Coded Value
Default value
Default value
DBO
SmallInteger
FClass
FClass
A short integer one-digit code defining whether a feature is intended for use as an NHD feature (1, will be used for conflation), a non-NHD feature (2, outside of the collection criteria and not intended to be used for conflation), or a nonhydrography feature (3, elevation dataset limitation).
Coded Value
Default value
Default value
DBO
SmallInteger
Limitation
Limitation
A short integer one-digit code that indicates whether the source elevation contained limitations that create issues meeting vertical or horizontal requirements for the hydrography feature.
Coded Value
Default value
Default value
DBO
SmallInteger
dataset
EPSG
8.2.10(10.3.1)
Simple
FALSE
68
TRUE
FALSE