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 […]
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 […]
Correct Flightline Errors The measure match tool is used to determine flightline shift. The find match tool is then run to determine necessary corrections After the find match tool finishes analyzing your dataset, apply the corrections Run the measure match tool a second time to see the decrease in flightline shift. RMS error should be […]
This delves into analyzing your LiDAR dataset to determine what errors you have. Tutorial
This tutorial teaches you how to assign flightline numbers to LiDAR points using macros. Assign Flightline Numbering to LiDAR Points
This tutorial goes through how to direct your project to your trajectories folder and then how to open up the trajectory window and display the trajectory in your main viewer/add it to your project. It then discusses how to clip the trajectory by an area of interest and give individual flightline names. Import Trajectories Tutorial
Radar imagery interpretation is difficult and variable without ground truthing. It is not based on a spectral response that we are similar with (visible, infrared or thermal) but is instead based on polarized microwaves. What this means is that it is sensitive to the roughness and orientation and nature of the ground surface. Radarsat can […]
LiDAR : Classifying Points Typical Classes 1 – Unclassified 2 – Ground Solid 3 – Low Vegetation 4 – Medium Vegetation 5 – High Vegetation 6 – Building 7 – Low Point (noise) 8 – Model Keypoints (mass point) 9 – Water If the point class you want is not already defined…DEFINE IT! Don’t forget […]
Select the helicopter in the TerraScan menu and open the desired *.las file for viewing. If you do not know how to open the TerraScan extension then refer to that tutorial. Select the helicopter in the TerraScan menu and open the desired *.las file for viewing. If you do not know how to open […]