Tuesday, November 14, 2017

Supervised Classification, GIS4035, Lab 10

In this weeks lab we learned how to perform a supervised classification using the ERDAS software.  This included combining similar features of the land area (water, forest, etc) given into a single classification. 

Tuesday, November 7, 2017

Unsupervised Image Classification, GIS 4035, Lab 9

In this weeks lab we learned how to to classify an image using both the Erdas and the ArcMap software.  Using the Erdas software we were able to combine several of the objects into a single classification based on its features.  For this example, the 50 items available (found in the attribute table) were selected,categorized and combined into 5 categories for our end result.     

Wednesday, November 1, 2017

GIS 4035, Thermal and Multispectral Imagery, Lab 8

In this week's lab we took a look at how to combine multiple layers into a single image.  The feature I chose was the evergreen / land section surrounded by the Guayas river in Ecuador.  The following band combinations were chosen for this feature; Red (layer 3), Green (layer 4), Blue (layer 6)

Wednesday, October 25, 2017

GIS 4035, Multispectral Analysis, Lab 7

In this weeks lab we were asked to generate three different maps using the multispectral viewer.  By changing the band combinations for each map we were able to clearly show the three different features (deep water, snow and shallow water).  The maps were generated using both ERDAS and ArcMap.  

Tuesday, October 17, 2017

Spatial Enhancement, GIS 4035, Lab 6

The above image was created using ERDAS imagine.  The following is an enhanced image of the I7_striping.img file modified using the fourier transform and convolution filters with an image kernel setting of 3x3 Sharpen.  I was able to generate the following example by generating a smaller low pass circle (approx half the size from the original example).    

Tuesday, October 3, 2017

GIS 4035, Intro to ERDAS Imagine and Digital Data 1, Mod 5

In this weeks lab we were introduced us to Erdas Imagine and Digital Data.  The lab focused mainly on the basic tools to familiarize ourselves with the program.  Above is a map containing the image created using Erdas and ArcMap.  In addition, we reviewed Maxwell's wave theory and how frequency of EMR and the wavelength relate ( Maxwell's Formula;  C = λν).

Tuesday, September 26, 2017

GIS 4035, Ground Truthing and Accuracy Assessment, Module

In this weeks lab we took a look at Ground Truth and Accuracy Assessment.  Using the map generated from the previous week, we had to determine how accurate our selections were while using google maps as a reference tool to pin point each location. For this lab, I randomly selected areas to compare to my results.  The results came out to be 73.33% accurate. To my surprise, this area consisted mainly of industrial/commercial properties and not residential.