RockWorks | Graphics | 2D Tools | Reassign Projection
This program is used to assign the coordinate system and units which are stored in a RockPlot2D map, or to change the system that's currently assigned. This does not reproject the coordinates, it simply relabels them. In other words, the coordinate numbers themselves remain the same, but the label regarding what the coordinates represent is changed.
This is the same tool which is available in RockPlot2D's Utilities | Diagram + Projection Info menu, but this Graphics menu option is available for the Playlist and for use in RockWorks Command Scripts.
Since this information is added automatically to 2D maps as they are created in RockWorks, this tool is typically used for imported graphics or RockPlot2D files from previous versions of RockWorks (RockWorks15 and earlier).
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.
Feature Level: RockWorks Basic and higher
Menu Options
Step-by-Step Summary
- Input File
- RockPlot2D Input File: Click to the right to browse for the existing Rw2D file to be edited.
- New Projection
- Horizontal (XY) Coordinates and Units: These settings define the coordinate system and units in which you want the XY map components are defined. You can choose from:
- Lon/Lat: Choose this to define your XY (map) with a decimal longitude and latitude coordinate system. (WGS 84)
- Local: Choose this if your XY (map) coordinates are represent measurements in a local grid (e.g. not using global system).
- Local Coordinate System Origin: 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.
- Units: Specify whether the Local coordinates represent Feet or Meters.
- SPC: Choose this option if your XY (map) coordinates are based on the US State-Plane coordinate system, NAD-83.
- State Plane Coordinate 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.
- Units: Specify whether the State Plane coordinates represent Feet or Meters.
- UTM: Choose this option if your XY (map) coordinates are based on a Universal Transverse Mercator system.
- Datum: Click on the large button to view the available projections.
- Zone: Click on this button to display an interactive map where you can click on the UTM Zone for the data.
- Units: Specify whether the UTM coordinates represent Feet or Meters.
- Other: Click in this radio button if you want to choose from an expanded list of projections. (More info)
- Vertical Units: Select the units that define elevations if your map represents a elevations. Choose either Feet or Meters.
- Output Options: Use these settings to define whether the output graphic is to be saved (or displayed as "untitled"), how the file should be named, and whether it is to be displayed after it is created. It also offers export options. (More info)
- Select the Graphics | 2D Tools | Reassign Projection menu option.
- Enter the requested menu items, described above.
- Click the Continue button to proceed.
The program will add this information to the meta-data in the Rw2D file, and save it under the new output file name. If requested the new map will be displayed in a RockPlot2D window.
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