2011-2013 Indiana Orthophotography (RGBI), LiDAR and Elevation
The State of Indiana is completing a 3-year program to acquire orthophotography (RGBI) and LiDAR/elevation data for the entire state of Indiana. Counties may elect to buy-up from 1 foot resolution, 4-band orthophotography to 6-inch or 3-inch resolution imagery. The project is divided into three acquisition areas: center (2011), east (2012), and west (2013). The State's vendor, Woolpert, acquired 28 of the center counties in 2011 and 34 of the east counties in 2012. For the 2013 acquisition year, in addition to 6 of the 30 west counties buying up to 6-inch imagery, the Cities of Vincennes and Bicknell purchased 6-inch orthophotography, and the City of Huntington and Purdue University purchased 3-inch orthophotography.
The program includes new U.S. Geological Survey (USGS) compliant light detection and ranging (LiDAR) data at either 1.0 or 1.5 meter nominal pulse spacing (NPS) for all Indiana counties, except: Porter, Steuben, Noble, De Kalb, Allen, Madison, Delaware, Hendricks, Marion, Hancock, Morgan, Johnson, Shelby, Monroe, and portions of Vermillion, Parke, Vigo, Clay, Sullivan, Knox, Gibson, and Posey. These counties provided LiDAR acquired between 2007-2010 (see elevation metadata for source date information). Woolpert processed this contributed LiDAR according to the 2011-2013 project specifications. For the 2013 acquisition year, Tippecanoe County and Purdue University purchased 3.6 square miles of 4 points/meter LiDAR.
Boone County (2011), Dearborn (2012), Floyd (2012), Madison (2012), Lake (2013), LaPorte (2013), Porter (2013), and Tippecanoe (2013) bought up to 1.0-meter NPS LiDAR. Although the DEM is a standardized 5-foot NPS, there is a horizontal and vertical accuracy difference between the NPS1.0 and 1.5 DEM files. The NPS 1.0 data (1"=100' scale) supports production of one foot contours. The NPS 1.5 data (1"=200' scale) supports production of two foot contours.
Woolpert compiled breaklines defining lakes (greater than two acres), double-line streams (wider than 100 feet), water bodies and streams using digital photogrammetric techniques as part of the hydrographic flattening process and provided as Esri Polyline Z and Polygon Z shape files. Woolpert used the breaklines to perform the hydrologic flattening of water bodies, and gradient hydrologic flattening of double line streams. The vendor compiled lakes, reservoirs and ponds (at a nominal minimum size of two acres or greater) as closed polygons and collected the surface at a constant elevation. The vendor compiled rivers and streams (at a nominal minimum width of 100 feet) in the direction of flow with both sides of the stream maintaining an equal gradient elevation. The project performed the hydrologic flattening of the LiDAR data to support inclusion of the dataset in the National Elevation Dataset (NED).
Orthophotography Source Date and Spatial Resolution Map
2011 and 2012 individual tiles: uncompressed geotiff; compressed (10:1) ecw format
2011 and 2012 mosaiced county images ecw format (20:1 compression for 1-foot images; 80:1 compression for 6-inch images)
Elevation and LiDAR Source Year & NPS Map
2011 and 2012 bare earth DEM with hydroflattening in ERDAS IMAGINE format (*.img)
2011 and 2012 county mosaiced DEM provided in ERDAS IMAGINE format (*.img)
2011 and 2012 classified LiDAR point cloud data in LAS file format, version 1.2
2011 and 2012 hydro breaklines
EPSG Code 2965, NAD_1983_StatePlane_Indiana_East_FIPS_1301_Feet
EPSG Code 2966, NAD_1983_StatePlane_Indiana_West_FIPS_1302_Feet
Units of Measure: us_survey_feet
Horizontal Datum: NAD83
Spheroid: GRS 1980
Vertial: GEOID NAVD1988 (elevation units of us_survey_feet)
This is a public domain dataset with no use restrictions.
Due to the easily alterable nature of electronic media, files, documents, and other deliverables, The State of Indiana and its Contractor, Woolpert, Inc. make no warranties, either expressed or implied, with respect to the accuracy, completeness, merchantability, or fitness for any particular purpose, including, but not limited to, use of any/all data as described within the metadata, by any user of this data. Any use will be at the end-users sole risk.
Dataset Contact Information:
State of Indiana GIS Officer
Indiana Office of Information Technology
100 North Senate Ave., Room N551
Indianapolis, IN 46204
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