Aerial Imagery and Terrain Modeling

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Imagery Mosaic of Collected Area

Digital Surface Model Sourced Topographic Map with 2-Foot Contours

2-Mile Highway Segment Flight Plan

Interchange area zoom with Lat/Long overlays

100% Zoom of pavement - reveals overall poor condition of highway surface

This collection was conducted in partnership with Le Sueur County GIS and the Minnesota Department of Transportation.  Multiple segments of Minnesota State Highway 112 were imaged in preparation of highway expansion and resurfacing.  The first 2-mile segment is depicted here and includes the Hwy 112 and Hwy 99 interchange. The collection flight lasted approximately 30 minutes.  Launch and recovery were from a county gravel road and over 500 images were compiled to create all the GIS products.  Photographic resolution was approximately 1.4 inches per pixel.   Of particular interest was the evaluation of elevation data accuracy compared to conventional survey techniques

MINNESOTA STATE HIGHWAY 112 PROJECT

3-D Point Cloud Model Centerline Elevation Analysis