Pitney Bowes MapInfo Professional - Manual (Page 356)

Due to this feature, these are the precedence rules for Map window projection.
Both vector and raster layers have "equal rights", that is, every new layer (without regard for type) is
reprojected into the current Map window's projection. That is, which ever map is opened first takes
precedence for projection.
You can change the projection of a Map window containing a mix of raster and vector layers by
setting the image processing reprojection preference to Always or Optimized. Note:
MapInfo Professional does not let you change the projection or image processing/reprojection of a map
that displays raster images from a tile server, because this would create inaccuracies in your map. The
projection system of the data may vary between tile servers. For this reason, we do not recommend
displaying tiles from different tile servers in the same map unless the tile servers use the same projection
system.
When you are working with palette raster images (like a scanned map), an image might contain all 256
colors. If you display this image in the Adjust Image Styles dialog box and clear the Transparent check
box, the color "white" becomes transparent. If you do not want this display behavior, select the Transparent
check box and choose another transparent color (using Select Color).
Transferring Vector Map Coordinates Directly to a Raster Map
To transfer the coordinates automatically from a vector map to a raster image, you need a vector map
of the same image. Then, you display the vector map side by side with the Image Registration dialog
box, which shows a preview of the raster image. Click a prominent feature in the vector map to determine
its coordinates and transfer this control point to the Image Registration dialog box.
To transfer a vector map's coordinates to a raster image:
1. On the File menu, click Open and Raster Image file format.
2. Choose the raster image file and click Open. The Display/Register dialog box displays.
3. Click Register. The Image Registration dialog box displays. A preview of the raster image appears
in the lower half of the dialog box.
4. Choose the Projection button to specify the image's projection. If you do not set the projection,
MapInfo Professional defaults to Longitude/Latitude or to the default table projection set in the Map
Window Preferences.
5. To add control points, click the Add button to add a control point entry to the Control Points list.
6. Click the Pick from Map button and select a location in the Map window that matches a location in
your raster image. MapInfo Professional updates the Map X and Map Y fields in the Edit Control
Point dialog box with the new coordinates. Click OK to save this entry and close the dialog box.
When the Pick from Map button is disabled, you can select locations directly from the open
map. If a map is not open, you can select another tool (like the Select tool) and use that tool
instead of the Pick from Map functionality. Note:
7. Highlight the entry in the Control Points list and click the matching control point location in the image
pane. The Edit Control Point dialog box displays showing the control point's location in pixels in the
Image X and Image Y fields. Click OK to save these entries.
Remember to type a meaningful description of this location in the Label field. Note:
8. Repeat this process until you have identified three or four non-linear points in the preview pane of
the Image Registration dialog box.
9. After you have defined all of the control points, click OK in the Image Registration dialog box. The
raster image displays in the Map window under the vector layer.
Use the Layer Control feature to position the raster map appropriately with your vector layers.
10. For details on converting degree/minutes/seconds coordinates to decimal degrees, see the Help
System.
MapInfo Professional 12.5 356
Opening a Raster Image