Resolving Data Positioning in Oasis montaj
The second major step in the Oasis montaj data processing sequence is to resolve data positioning. This process can consist of interpolating, projecting and/or warping data.
Introduction to Coordinate Systems and Projections
A coordinate system defines how geographic locations on Earth (longitude and latitude in some datum) are represented on a flat map sheet. Geographic map locations (X, Y, Lat, Long) are either in an implied or a known coordinate system. If you do not specify a coordinate system for your data,
Define map coordinate systems if you want to do the following:
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Annotate maps with longitude, latitude locations
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Convert the location of information (data or grids) from one coordinate system to another
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Display information on a map that is in a different coordinate system
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Define a warped coordinate system to fit data to a desired map coordinate system
In
Map projections can be defined for any pair of channels in a database, for a grid coordinate system, and for a data view in a map. In most cases, all that is required is to define the coordinate system of the "X" and "Y" channels of an original database. This coordinate system will then be passed on to grids when data is gridded, and map views will inherit this projection when they are created and posted to the map. Coordinate systems for data channels, grids and views can also be viewed and modified at any time; although, the modification of map coordinate systems does require specific and accurate knowledge of the coordinate system information.
What do you want to do?
Define and Modify Map Projections
Define the coordinate system for database channels
Define the coordinate system of a grid
Define the coordinate system of a map view
Annotate Longitude and Latitude Coordinates on a Map
Display with Different Coordinate Systems on a Map
Define and Apply a Warp
Define a warp file interactively
Define a warp file semi-interactively
See Also:
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