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Projection change

GIS ProjectionProjection file

5.1 Projection Change
Spatial data with co-ordinates of a known projection are normally transformed from one projection co-ordinate system to another using the forward and inverse projection equations.

 


Because it changed when the View's projection changed, what does this imply about the relationship between a View's projection and the graphics in the View?
How does text in a View respond to changes in projections? Does its angle change? Its size?

Here is an example of how a projection changes a set of coordinates. The original longitude/latitude coordinate is somewhere within Seattle.
Projection, zone, datum (units)
X ...

greater flexibility in output - easy scale or projection change - maps can be tailored to user needs
other uses for digital data
Disadvantages of computer cartography ...

There are many other examples of data manipulation that are routinely performed in GIS. These include projection changes, data aggregation (for example, to convert sales territories for census building blocks), ...

See also: Map, Geographic, GIS, Information, Surface

GIS ProjectionProjection file

 
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