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Published byBaldwin Crawford Modified over 9 years ago
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2007 Indiana GIS Conference City of Bloomington Contour Update Project Laura Haley, GIS Manager haleyl@bloomington.in.gov
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2007 Indiana GIS Conference Contour Update Project History of Previous Projects Contour Updates from 2005 Statewide Data How Bloomington Uses Contour Data
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2007 Indiana GIS Conference 1991-1992 Orthophotography, Planimetric, and Contour Mapping. Used Traditional Photogrammetric Techniques
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2007 Indiana GIS Conference 1998 Update Project Topography updated only in areas of significant change.
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2007 Indiana GIS Conference 2005 Statewide Orthophotography Project
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2007 Indiana GIS Conference New Contour Generation Earth Data International Used additional control available not used in state project and recalculated the AT. Created a DTM (mass points and breaklines) Generated 2 Foot Contours and Spot Elevation Points.
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2007 Indiana GIS Conference New vs. Old Accuracy, Display, Density
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2007 Indiana GIS Conference
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Using our Data Planning Department Development Review, Long Range Planning, & Environmental Planning Identifying areas of concern; steep slopes, karst features, floodplain, and drainage issues Environmental Resource Inventory – Sensitive Area Analysis
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2007 Indiana GIS Conference Sinkhole Identification Locate Depressed Contours Areas of Karst Topography
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2007 Indiana GIS Conference Identified closed contours and field checked. Green – Potential Sinkholes Red – Sinkholes
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2007 Indiana GIS Conference City & Utilities Engineering Planning & Preliminary Design Work for Capitol Improvement Projects; sidewalks, street improvements, water, sanitary sewer, and storm water systems. Base elevation reference for assets. Drainage Assessment – Identifying drainage basins, smaller drainage areas, and storm water detention/retention areas.
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2007 Indiana GIS Conference Sidewalk Plan Drawing
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2007 Indiana GIS Conference Delineating Drainage Basins
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2007 Indiana GIS Conference City of Bloomington Contour Update Project Laura Haley, GIS Manager haleyl@bloomington.in.gov
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