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Service Description: 2010 saw the beginning of The Northeast Multiphase LiDAR Project. Across the region, the same problems were being addressed – the almost total lack of contiguous, consistent, high-resolution elevation data. Coordinated by the USGS with representatives from each of the participating states, this work sought to collect seamless LiDAR data for all of the coastal counties between New York and Maine. With accuracies 25 – 100 times better than what is currently available for much of Rhode Island, a contiguous and consistent elevation dataset derived from this new data collection initiative will facilitate a number of statewide applications including transportation planning, floodplain mapping, and hazard mitigation. As part of this project, the contractor delivered to the State of Rhode Island raw and classified LiDAR points along with a hydro-flattened 1m digital elevation model (DEM). In 2012, the RI Department of Transportation funded the project "Open Access to High Resolution Elevation Data for Transportation Planning in RI". The three primary goals of this work were to: 1) make the USGS Northeast LiDAR data and derivative products readily accessible to RIDOT and RIGIS users; 2) to develop a statewide ArcGIS terrain dataset as the primary container for storing/accessing the state's elevation data; and 3) develop refined engineering quality elevation products for RIDOT project planning. As part of this work, the 2011 USGS-delivered LAS data was subset to extract just the bare earth elevation points. These were reprojected to the RI State plane coordinate system, and horizontal/vertical units were converted to feet. These points were put into an ArcGIS Terrain dataset and combined with bathymetry values for interpolation and conversion into a seamless, state-wide, topobathy DEM. Bathymetry data was obtained from 2 sources: the NGDC Bathymetry Data Viewer (http://maps.ngdc.noaa.gov/viewers/bathymetry/), and the Army Corps of Engineers 2010 coastal LiDAR survey. The ACOE data focused specifically on the south coast of RI, out to a distance of approximately 1km; NOS soundings and multibeam data were used everywhere else. All NOS surveys for RI coastal waters were used from 1980 thru 2009. Pre-1980 surveys were only used when needed to fill in large data gaps offshore.

Map Name: TopoBathy

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• RI TopoBathy Hillshade (0)

Description:

Copyright Text: Rhode Island Sea Grant; University of Rhode Island Environmental Data Center (URIEDC); RI Division of Planning; RI CRMC

Spatial Reference: 102100  (3857)


Single Fused Map Cache: false

Initial Extent:

XMin: -8082459.933677072
YMin: 5088167.6469787285
XMax: -7837789.779330624
YMax: 5172701.393005047
Spatial Reference: 102100  (3857)

Full Extent:

XMin: -8005666.275432427
YMin: 5031739.436123324
XMax: -7914583.4375752695
YMax: 5165988.918867822
Spatial Reference: 102100  (3857)

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Title: Rhode Island Topopographic/Bathymetric Hillshade
Author: Cdamon (URIEDC)
Comments: 2010 saw the beginning of The Northeast Multiphase LiDAR Project. Across the region, the same problems were being addressed – the almost total lack of contiguous, consistent, high-resolution elevation data. Coordinated by the USGS with representatives from each of the participating states, this work sought to collect seamless LiDAR data for all of the coastal counties between New York and Maine. With accuracies 25 – 100 times better than what is currently available for much of Rhode Island, a contiguous and consistent elevation dataset derived from this new data collection initiative will facilitate a number of statewide applications including transportation planning, floodplain mapping, and hazard mitigation. As part of this project, the contractor delivered to the State of Rhode Island raw and classified LiDAR points along with a hydro-flattened 1m digital elevation model (DEM). In 2012, the RI Department of Transportation funded the project "Open Access to High Resolution Elevation Data for Transportation Planning in RI". The three primary goals of this work were to: 1) make the USGS Northeast LiDAR data and derivative products readily accessible to RIDOT and RIGIS users; 2) to develop a statewide ArcGIS terrain dataset as the primary container for storing/accessing the state's elevation data; and 3) develop refined engineering quality elevation products for RIDOT project planning. As part of this work, the 2011 USGS-delivered LAS data was subset to extract just the bare earth elevation points. These were reprojected to the RI State plane coordinate system, and horizontal/vertical units were converted to feet. These points were put into an ArcGIS Terrain dataset and combined with bathymetry values for interpolation and conversion into a seamless, state-wide, topobathy DEM. Bathymetry data was obtained from 2 sources: the NGDC Bathymetry Data Viewer (http://maps.ngdc.noaa.gov/viewers/bathymetry/), and the Army Corps of Engineers 2010 coastal LiDAR survey. The ACOE data focused specifically on the south coast of RI, out to a distance of approximately 1km; NOS soundings and multibeam data were used everywhere else. All NOS surveys for RI coastal waters were used from 1980 thru 2009. Pre-1980 surveys were only used when needed to fill in large data gaps offshore.
Subject: A hillshade derrived from the seamless TopoBathy Digital Elevation Model (DEM) for RI
Category:
Keywords: planningCadastre,Rhode Island,Elevation,LiDAR,Hillshade,Bathymetry,RhodeIslandDigitalAtlas,RIGIS,URIEDC
AntialiasingMode: None
TextAntialiasingMode: Force

Supports Dynamic Layers: true

Resampling: false

MaxRecordCount: 1000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON, PBF

Supports Query Data Elements: true

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true



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