RockPlot2D | Utilities | Projection
This program is used to:
- define the type of diagram displayed in RockPlot2D - map, section or profile, or chart
- specify diagram units for spatial diagrams such as profiles and maps
- specify the coordinate system for maps
Since this information is added automatically to 2D plots as they are created in RockWorks16, this tool is typically used for imported graphics or RockPlot2D files from previous versions of RockWorks. It is used to assign the units and projection to an existing image.
Why bother? Assigning coordinate units and projection to a spatial diagram such as a map or a cross-section or profile will enable you to export the diagram to Google Earth or other GIS applications.
Related Topics:
Menu Options
Step-by-Step Summary
Menu Options
- Diagram + Units Tab
-
- Diagram: Choose the diagram type from the drop-down list.
- None: Choose this option if you don't need to define the diagram type.
- Map: Choose this option if the image contains a plan-view map, in which the horizontal and vertical axes represent map coordinates.
- Section or Profile: Choose this option if the image contains a diagram in which the horizontal coordinate represents distance in map coordinates, and the vertical axis elevation.
- Chart: Choose this option if the image contains a diagram such as a rose diagram or frequency histogram, with no spatial information.
- XY Coordinates: This option will be displayed if your diagram is a map or section/profile. Choose from the drop-down list the coordinate system represented in the horizontal and vertical axes of the map, or the horizontal axis of the section/profile.
- Local Feet, Local Meters: You can geo-reference your local coordinate system by entering the longitude and latitude coordinates in decimal degrees that exist at the local coordinate "origin" of 0,0. If you don't know these global reference coordinates, you can leave the Local Origin set to a Longitude of 0.00000 and a Latitude of 0.00000.
- State Plane Feet, State Plane Meters:
- Zone: The State Plane systems are zone-specific, so you need to define the zone to which the coordinates apply. Click on the Zone button to see a reference map; choose the zone from the scrolling list to the right of the map.
- UTM Feet, UTM Meters:
- Datum: Click on this button to view the available projections. The two most common projections for the U.S. are:
- Clark 1866 (NAD-27): Used within most USGS maps. NAD-27 coordinates may be as much as 200 meters from WGS-84 (NAD-83) datum of the exact same coordinate.
- WGS-84 (NAD-83): Used by GPS (Global Positioning System) units and more recent USGS maps.
- Zone: Click on this button to display an interactive map where you can click on the UTM Zone for the data.
- Coordinate Summary Tab: This will display the minimum and maximum coordinate values for the horizontal and vertical axes, for your reference.
Step-by-Step Summary
- If necessary, open the Rw2D file or the older RK6 or RKW file you wish to work with, or import the external graphic.
- Right-click in the image and choose the Projection option from the pop-up menu. Or, select the RockPlot2D Utilities | Projection menu command.
- Enter the requested menu items, described above.
- Choose OK to proceed.
The program will add this information to the meta-data in the Rw2D file.
See also
Back to Manipulating RockPlot2D Files
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