Thursday, June 9, 2016

Remote Sensing

I used Wayne County Landsat images. After spending some time experimenting with displaying different band combinations of Red, Green, and Blue values, including popular Landsat band combinations, I moved on to successfully display three bands simultaneusly. Below are my subset images of Wayne County. First my Unsupervised Classification:

After three tries I decided to give up on gettting all, or any, of my Supervised Clasification fields above 50%. I think the biggest problem with it is the roads in orange. Clearly there aren't huge chunks of roads like this. Surprisingly that field is the greatest percent reference accuracy. I think those orange road stripes across the water are cloud cover. But I think the urban area may be correct, as that is Detroit in the top right, and then further south Toledo. The vegetation could be correct to, but you would think there would be a lot more of it. 


Wednesday, June 8, 2016

Attribute and Spatial Queries

1. US cities that have more than 500,000 population are generally located in the east.

2. Separate State layer.

3. Cities in state. 

4. Cities in state with over 25,000 population. 

5. Roads that intersect my state 

6. Cities that lie within 50 miles of Lake Superior.  


7i. The following darker areas are more than 950 ft in elevation.

7ii. The following darker areas are between 925 and 1050 ft. 

7iii. These are areas that have less than 1000 ft in elevation and are also less than 50 degrees in slope. I assume the slope degree is set in the “z factor” box of the slope dialogue, i.e. putting 50 in there indicates all areas 50 degrees and under.


7iv. These are areas that have more than 1000 feet in elevation and less than 30 degrees slope.