Todd Mitchell

GEOG-499c

Lab 3: Cartographic Modeling

 

Answers to Lab Questions:

MAPS

 

1. Read GTKArcGIS Chapter11 and Chapter 12, familiarize you with the issue in the two chapters. What are the criteria used by the company in evaluating the forest?

 

The timber values of the potential lease areas needed to be calculated. The stands were dissolved into five lease areas to determine how much each lease area was worth. Lease area ëFí (the most harvestable lease) needed more definition in terms of non-harvestable streams and goshawk nests. This definition was done with a ëclipí of streams and ëselectioní of nests to the ëFí lease boundary. Government regulations prohibit logging within an 800 meter distance from goshawk nests and 50 meters from streams (100 meters from salmon spawning areas). These areas were determined with ëbufferí and the resulting buffer layers were joined by ëunioní into a ìNo Cut Area.î Finally, the value of just the harvestable areas needed to be calculated. This was done through definition query, and assigned a more accurate value to the harvestable area within the lease.

 

2. Read GTK ArcGIS Chapter 20, answer the following questions.

 

a. What are the major components in a flowchart (model)?

 

Input data, a tool for a particular operation, and output data.

 

b. What are the advantages of using ModelBuilder?

 

ModelBuilder saves time by eliminating repetitive spatial analyses and allowing the user to change parameters in a model without reconstructing the entire workflow. It also helps users share information and establish uniform practices.

 

 

Model 1:

Map 1:

 

Model 2:

Map 2:

 

Model 3:

Map 3:

 

Screen Grab:

 

Bonus Model: