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Orthorectification & DEM Extraction

  Technical Guides & other reference material

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Airphotos contain systematic distortions caused by camera angle, distance, and surface elevation. As a result, their internal geometry differs from the ideal geometry of map products and therefore they are of limited use in professional geospatial analysis.

TNTmips has tools for creating an orthoimage by applying elevation information (DEM) to a stereo pair of airphoto imagery. Orthophotos have map-like geometry and provide an accurate image base for many projects in geospatial analysis.

Orthorectification & DEM Extraction

PDF Tutorial: Making DEMs and Orthophotos

demortho

v59 Orthorectification & DEM Extraction

PDF SPOT Restitution from DEM

59spot

v56 Orthorectification & DEM Extraction

PDF DEM-Orthophoto Features

56DEMorthofeatures

v54 Orthorectification & DEM Extraction

PDF TIN Densification in DEM Extraction

54TINdens

v53 Orthorectification & DEM Extraction

PDF Lake Filling in DEM Extraction

53lakeFill

v52 Orthorectification & DEM Extraction

PDF Evaluating DEM Extraction Results

52DEMresults

v50 Orthorectification & DEM Extraction

PDF Stereo to DEM Improvement

50stereo2DEM

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page update: 15 May 13