• Global Mapper : Importing *.las Files

    Importing *.las Files into Global Mapper The first step is selecting the “open your own data files” button or the open folder icon. After doing this a dialogue box will pop up asking for your projection. Choose the appropriate projection and select ok. Ensure that the data is opened as a point cloud and hit […]

  • ERDAS : Import GLOBE DEM Data (Assign Origin)

    The import manager will open the dialogue to the right. Select the data to be imported and the export location. Click Ok. The next dialogue has information that needs to be provided (highlighted below). For the example dataset BIL and Signed 16 bit should be used. For more info on what signed/unsigned bits are look […]

  • MicroStation : Accuracy Assessment

    MicroStation can only read PXYZ (point, easting, northing elevation (orthometric height)) files. You must first change your files to this format and save as *.csv. Load in a vector (*.shp file) of control point locations. This can aid in determining accuracy issues. Go to MicroStation–>Tools–>Toolboxes and select it. Turn on XYZ Text   Next you […]

  • Microstation : Geoid Adjustment – Ellipsoidal to Orthometric Heights

    Open up Terrascan and Read Points. It’s important to only open every 100th point for processing time. The next step is to export a lattice model. Grid spacing of 500m is acceptable because the geoid model has km long arcs. Filling gaps will prevent gaps in your TIN. Three decimal places will give you mm […]

  • ERDAS – Normalized Difference Vegetation Index (NDVI) Tutorial

    The NDVI tool displays stages of growth by normalizing the difference between the Red and Near Infrared bands using the equation (NIR-Red)/(NIR+Red).



Remote Sensing

Geoprocessing and Spatial Analysis

GIS and Thematic Maps