Mapping GIS data. Entering and Storing data on GIS is OK, but not much fun. We want to look at the maps and see them at a bunch of different scales! sounds pretty easy, but be aware When you print a map, the scale is fixed to the paper;
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Entering and Storing data on GIS is OK, but not much fun.
We want to look at the maps and see them at a bunch of different scales!
sounds pretty easy, but be aware
When you print a map, the scale is fixed to the paper;
When you view it on screen, It changes depending on the level of magnification
In short, what looks good on screen may not look good on paper and vice versa
1/24000 is a larger fraction than 1/62500
Thus the 1/24000 map shows a smaller area at higher level of detail or resolution
State boundary drawn to cover entire state was collected at much smaller scale than voting district lines, each of which is at a very large scale
each pink shaded polygon is a state
A geological map is a Unique Values Map based on categorical data representing different formations, or other geological units
Two varieties of precipitation maps using color intensity
The top map uses a monochromatic intensity ramp to represent various increasing amounts of annual rainfall
The bottom is a two toned color ramp of the same data, with yellow = dryer and green = wetter
Dot density maps can normalize the data by letting each dot represent 1 million people.
the more dots, the more people in that state. Can be arranged in specific locations in the state too
b) Thematic raster continuous classified values- elevation
- a one std dev stretch
Stretched green bandwidth