Tuesday, November 5, 2019

Week 2: Land Use/Land Cover

Hello again,
       This week was about land use and land cover where I took a provided image and made a feature class (LULC) to create polygons in order to class II classify the land usage of the image using ArcGIS Pro. The levels were as follows: 

  1. Urban or built up land
    1. 11: Residential
    2. 12: commercial service
      • 129: vacant
    3. 13: Industrial
    4. 14: Transportation, Communications, and Utilities
  2. Agricultural Land
    1. 21 Cropland and Pasture
  3. (4)Forest Land
    1. 41 Deciduous Forest Land
  4. (5)Water
    1. 51 Streams and Canals
    2. 52 Lakes
    3. 54 Bays and Estuaries (did not have enough time)
  5. (6)Barren Land
    1. 73 Sandy Areas other than Beaches
After the digitizing and categorization was done I created a point shape file to plot points at semi-random to check for accuracy. My method was kind of used a grid where I went left to right and clicked at random on that line motion. Then to check I used an "in/on field" accuracy assessment using google maps street view. I was unsure how to calculate accuracy and I forgot to add the accuracy to the map. But I was unsure of the numbers anyway. If we count the water areas I did not digitize then I probably got around 60-65%, and if we ignore that I think I would say 70-75%. I may be wrong however. 
     The colors I chose to categorize was from the random assortment of bold colors with slight tweaking so green corresponded to trees and blue to wetlands and all set at a transparency of 40-50% depending on the vibrancy.
     Below is the finalized map, I probably spent too long on the digitizing but it looks good.
     Thank you for reading and hopefully you stay tuned for next week.
     ~Jo Snow. 

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