Tristan H's GIS Blog

Spatial Enhancement, Multispectral Data, and Band Indices. In this lab learned how to apply spatial enhancements, a preprocessing step preparing the imagery for use,  how to view the properties of multispectral imagery, and create band indices. Student Learning Outcomes: ▪ Download and import satellite imagery ▪ Perform spatial enhancements in ArcMap and ERDAS ▪ Explore Image Histograms ▪ Operate the Inquire Cursor ▪ Interpret histogram data in images ▪ Utilize the “Help” menu effectively ▪ Identify features by interpreting digital data ▪ Create Spectral Band Indices Task 1: Basic filters (in Imagine) For task one we explored the various filters in Imagine including the highpass, lowpass and sharpen filters as well as various tools and best use cases for each.  Task 2: Other filters For this task we explored the Focal statistics tool including the mean and range statistic types including edge detection filters.  Exercise 3: Image Histograms For exercise three we explored...

 ERDAS Imagine and Digital Data Topics Covered: Calculate wavelength, frequency, and energy of EMR Locate about and use basic tools in ERDAS Imagine Learn about and use the Viewer to view data in ERDAS Imagine Subset data in ERDAS Imagine as a preprocessing step for making a map (in ArcGIS)  Utilize the tools and functions of ERDAS Imagine Interpret the Layer Info of digital data in ERDAS Imagine Distinguish between the four types of resolution in ERDAS Imagine Interpret and analyze thematic Rasters in ERDAS Imagine For this lab we first explored the basic functionality of ERDAS Imagine in order to process and examine several images related to ground cover of the Puget sound region of Washington State. By contrasting Multispectral imagery as well as TM False Natural Color and TM False Color IR band combinations we were able to identify clearcut sections of forest to them create maps within ArcGIS Pro.