Category: Remote Sensing

PCI EASI Script [PIX_to_SHP_batch_export.eas]

This simple EASI script used with the MODEL command in PCI will batch convert vector files stored in PCIDSK (PIX) format into Shape File (SHP) format with the exact same file name as the input files. This was originally created for PCI Geomatica v9.1 but was last tested and working with no problems in PCI Geomatica v10.0 !—————————————————————————- !—————————————————————————- [...]

Multiple File Subset Script – PCI EASI Script

This EASI script in PCI will batch subset a directory of input files based on a defined input window.

Script to generate a PIX file large enough to contain all input DEM files

This simple EASI script used with the MODEL command in PCI will generate an output PIX file with extents large enough to contain all of the files and then mosaic each of the input files into the output DEM file.

Script to clip the unnecessary excess portions of an air photo mosaic

This simple EASI script used with the MODEL command in PCI will clip the unnecessary excess portions of an airphoto mosaic created from Ortho Engine to an irregular buffered shape around a set study area.

Digital Terrain Modeling – Aspect models

In digital terrain modeling the Aspect of a surface refers to the azimuth to which a slope is orientated. The aspect or orientation of a slope can produce very significant influences on it, so it is important to know the aspect of the plane as well as the slope.Together the slope combined with the aspect of the surface can virtually define the surface plane completely in digital terrain modeling

Example of an Aspect Map

This image is an Aspect Model that I derived from a digital elevation model (DEM) of Lismore, Nova Scotia. The aspect values of the slopes of the DEM are represented in the model by a 0-255 grey scale color ramp. Click here to learn a little more about Aspect Models and how the image below was created.

Slope

The slope or the gradient of a straight line within a Cartesian coordinate system is known as the measure of how steep a line is relative to the horizontal axis. In terrain modeling we generally model an entire surface and not just one line so we need to calculate the slope of a best fit surface plane (which is made of lines). Together the slope combined with the aspect of the surface can virtually define the surface plane completely.