GeoTools -> Geographic Tools

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Toolbar : Geographic
      Menu : GeoTools Geographic Tools Coordinate Transformation
Command line : GT_COORDTRAN
The GT_COORDTRAN command provides Coordinate Conversion from one system to another, It provides options to convert between the following coordinate systems:

  • Lat-Longs (geographic)
  • UTM (Universal Transverse Mercator)
  • Transverse Mercator
  • Lamberts Conformal Conic
  • Albers Equal Area Projection

To use GT_COORDTAN, you will need to know exactly what projection system your existing coordinates are in an what system you  want it to be transformed to. You will also need to know which spheroid (and datum) your data should be in.




Toolbar : Geographic  
Menu : GeoTools Geographic Tools
Coordinate Transformation Setup

The GT_COORDTRAN_SETUP command is used for setting the parameters for coordinate transformation. Please remember that the transformation parameters must be set with care and caution. If you are doing UTM2Geo or Geo2UTM transformation, you must specify the zone number correctly.





Toolbar : Geographic  
Menu : GeoTools Geographic Tools
DWGKML - Interactive
Command line : GT_DWG2KML 

GT_DWG2KML is used to convert CAD data to Google KML files. The KML (Keyhole Markup Language) format is an ASCII (as well as binary [KMZ]) format in which vector data about geographic features on the surface of this earth can be represented. KML is a variant of the XML format and is the native format used by Google Earth and Google Maps to superimpose user-data on its maps. Vector data from CAD and other GIS software can be super-imposed on the satellite imagery in Google Earth providing a meaningful interpretation of the underlying terrain data. You can also attach attributes and terrestrial images (photos) to features which can be displayed on a popup window.

DWG2KML Main Dialog

DWG2KML Data setup Dialog




Toolbar : Geographic    
      Menu : GeoTools Geographic Tools DWGKML - Batch  Feature
Command line : GT_DWG2KML_BATCH1F
GT_DWG2KML_BATCH1F is a batch process, command-line version of the KML export program, which allows a single feature export.





Toolbar : Geographic
      Menu : GeoTools Geographic Tools DWGKML - Batch  Multiple Feature
GT_DWG2KML_BATCHMULTF allows multiple feature export in one operation, defined by schema and folder-based classification. This tool is suitable to be run in batch mode by supplying all the required parameters in a script file.



Toolbar : Geographic 
      Menu : GeoTools Geographic Tools Insert a geo tagged photo
Command line : GT_INSPHOTO
GT_INSPHOTO allows a geo-tagged photo to be attached to your CAD drawing. Geo-Tagging is a method by which geographical position info is attached to a normal photo image (JPG, PNG, GIF etc) as a meta data, such that the location (latitude and longitude) where the photo was taken is stored along with the image file. Such a capability is now common-place with smart phones and tablets which have built-in GPS capabilities. It is also possible to geo-tag a photograph using many of the higher end cameras in the market today.

The GT_INSPHOTO is a great tool to import your geo-tagged images into CAD for subsequent export into a KML file using the GT_DWG2KML command.

You can select multiple image files for import, a starting ID, an ID prefix and also determine the next highest available ID in your drawing. The EXIF data from the images can also be saved optionally as xdata attached to the objects so that they can be further exported into a KML file is necessary or used by other programs, or using the GT_DWG2KML function in GeoTools.




Toolbar : Geographic 
      Menu : GeoTools Geographic Tools Insert a geo tagged photo
Command line : GT_KML2DWG
The GT_KML2DWG command complements the GT_DWG2KML(Google Export) tool. In its first version now, the GT_KML2DWG command reads KML or KMZ files generated by Google Earth and recreates placemark points, polygons and paths in the drawing. The objects are placed in the drawing in the same units as those that exist in the KML/Z file. With this command, it is now possible to do a complete round-trip of information from CAD to Google Earth and back. The GT_DWG2KML command is used to export dwg entities to KML/Z format which can be opened in Google Earth.




Toolbar : Geographic
      Menu : GeoTools Geographic Tools Google Earth Image Import
The GT_GEIMPORTIMAGE command is a process tool to capture a view window in Google Earth and import the same into CAD. It is a semi-automatic assisted procedure that involves using Google Earth commands & operations in an exact step-by-step procedure and attach the current Google Earth view in CAD using geo-referenced coordinates.

The command relies on the ability of Google Earth to extract the cursor coordinates into clipboard memory. You are asked to zoom to the area of interest and position the cursor at the lower left and upper right coordinates as accurately as you can. The coordinates are captured in clipboard and accessed by CAD. You are then asked to save the image in Google Earth and the same is attached in CAD using the correct geo-referenced coordinates.


Toolbar : Geographic
      Menu : GeoTools Geographic Tools Google Earth Rubber Sheeting
Command line : GT_GERSHEET
The GT_GERSHEET command is a workaround
tool to do a 2-point rubber-sheeting of vector data to fit it in Google Earth. It works on the same principle as the GT_GEIMPORTIMAGE which is used to import geo-referenced screen-shots from Google Earth into CAD.

The GT_GERSHEET fits your existing CAD data into the LatLong format as expected by Google Earth. The command works by asking to pick two known points in CAD and in Google Earth. With these coordinates, a simple rubber sheeting (scale and move) is performed.

This ensures that the coordinates are now in Lat Long coordinates matching Google Earth coordinates.

However, many users have their CAD data in a projection system like UTM. Even when their data is in LatLong, it may not fit Google Earth correctly because of differences in Spheroid or Datum.

The command provides step-by-step instructions on how to setup and capture your coordinate both in CAD and in Google Earth.

First, you pick the first known point in your CAD data and zoom into the same location in Google Earth. You then capture the LatLong coordinates of the point in Google Earth using Control-Shift-C. These coordinates are transferred to CAD from the clip-board.

Next, you pick the second known point in CAD and zoom into the same location in Google Earth. Capture the coordinates again using Control-Shift-C and the coordinates are transferred to CAD again.

Using these two pairs of known source & target coordinates, GeoTools does a simple scaling and moving to fit the selected CAD data into the correct geographical location as required by Google Earth.

The GT_GERSHEET command requires you to have your CAD and Google Earth running together to perform its job.

Next, you can export this data to Google Earth using the GT_DWG2KML command, and the KML file is imported into Google Earth to fit the imagery exactly.

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