The status bar on the bottom of the IMAGINE interface contains several helpful functionalities, including the ability to associate elevation data to an image. In the space to the left of the rotation indicator, click and select Add Elevation Source, then select a DTM that overlaps the imagery in the viewer. The elevation data will now populate this area when moving the cursor over the image. You can also do image rotation and on-the-fly coordinate conversion from the status bar.
Many functions within IMAGINE have hotkey shortcuts associated with them. To display the hotkey assignments, click the ALT button on your keyboard. First, use the hotkeys assigned to the tab. Then, once the tab is defined, more Hotkeys will display for the functions within that tab.
For commonly used workflows, you can create a custom My Workflow tab. To create an add functions to a My Workflow tab, right-click on a function and select Add to My Workflow tab. Click on the new My Workflow tab to view the added functions. Use the Tab Editor to organize the functions and assign names to groups.
In ERDAS IMAGINE, it is easy to create vector contours, even from very dense point clouds.
On the Terrain tab, open the Terrain Prep Tool. Load in all of the LAS files (or DEMS, or ASCII files, or 3D Shapefiles) from which you want to generate contours. No need to Mosaic them together beforehand!
Next, select Process -> Surface. On the Contouring tab, check Output Contours, give the output file a base name, and click OK. The software starts by tiling out the data into manageable-sized pieces, and then creates the contours at the intervals you specified.
And you’re done!
The answer to this lies in the shadows. Literally. The length of a shadow is directly proportional to the placement of the sun and the height of the object.
In ERDAS IMAGINE 2015, you now have three different options for measuring height from calibrated imagery:
Height from Layover
Base Shadow Height (measure from the base of the object to the tip of the shadow)
Top Shadow Height (measure from the top of the object to the tip of the shadow).
Now, by measuring the shadow and using the sun elevation and azimuth recorded at the time of image capture, you can calculate the height of objects in your imagery!
In the example right, the tower rises from the center of the memorial, so we need to use the Top Shadow Height option to measure the building. We place a point at the top of the spire, then a second point at the tip of the shadow. The software does the rest! And, just like before, you can save the measurements directly into vector attributes.
A geoworkspace only saves a link to the corresponding file (shapefile, mdb etc.) if these files are moved from the specified folder the link will be broken. Upon opening the geoworkspace the link will have to be restored by pointing Geomedia to the corresponding folder.
Remember the mouse pointer can apply multiple functionality. Example: One cannot pan around on the map if the mouse pointer is set to select
Stay zoomed in at a low scale – the larger the viewing area the more data has to load in the map window i.e. the slower the functionality
When saving tables/feature classes never leave a gap in the naming of the table/class as this will lead to these tables not opening.