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This tool is considered obsolete, as the GRP file type has been phased out.
Use this command, located on the Tools Menu > Import/Export Menu, to import .grp layer files from Think Map Version 3, GISMapLite, or Citymap.
To import GRP files:
1)From the main menu select Tools - Import/Export - Import From GRP File
2)Browse for the GRP file that you want to import.
3)Does this GRP file use Longitude/Latitude Coordinates? If the GRP layer was part of a map that was based on a longitude/latitude coordinate system then answer yes to this question. See note below on reprojection.
4)Select an import method:
oAdd to an existing Layer: Select this option to import the GRP file into a layer that already exists on the map combining it with any content that already exists on that layer. You will next be prompted to select an existing layer and then a list of source and destination fields will be displayed where you can specify what fields in the GRP file get copied to what fields in the destination layer for each feature that is imported.
oOverwrite an existing Layer: Same as above only the layer will first be erased before importing.
oCreate a new Layer: Select this option if you want to create a new Layer for this GRP file. You will next be prompted to type a name for the new layer.
5)Should closed polylines be treated as areas? Answer yes to this question if this layer has or may have boundaries. Think GIS will recognize any Feature who's line segments form a loop as being a boundary and import them as an area type entity. If you are certain the GRP file does not consist of any boundaries answer no to eliminate this unnecessary processing time.
6)Do you want to break polylines at every intersection? If you answer no to this question Think GIS will convert all adjacent line segments of the same feature into a single polyline entity. Answer Yes if you want Think GIS to create a separate polyline entity for each section of road between intersections. Answering Yes produces the best results at the cost of a little extra processing time.
Notes:
•GRP import process does not reproject coordinates. Regardless of your answer to the question in step 3 above, Think GIS will import the data as-is. To determine the coordinate system of the GRP file open the Think Map version 3 map file that used this layer and press Ctrl-Alt-C to display the coordinate system. If you need to reproject the layer you will need to do the following:
oImport the GRP file into a version 4 map that uses the same coordinate system as the GRP file.
oThen open a map that uses the new coordinate system and add the TML file from the previous step to this map. Think GIS will convert the TML file to the new coordinate system as it is added to the second map.
•It is normal for file sizes to reduce. The resulting TML files may take up as little as 1/8th the file space of their corresponding GRP files.
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