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CAD Geodesy Assistant

CAD Geodesy Assitant is an addin for your CAD system extending the geodetic functionality through a set of commands and a simple dialog based user interface. These extra commands are availble to enter at the CAD prompt hence they can be added to your own customisation of the CAD user interface.

This addin is currently available for the following CAD versions:

  • - AutoCAD 2020 64-bit for Windows
  • - AutoCAD 2021 64-bit for Windows
  • - AutoCAD 2022 64-bit for Windows



CAD Commands and Geodetic Features

The commands are prefixed with 'cg' to assist the user with the command selection of this addin.

  • cgGeoDist - Displays geodetic information from two geocoordinate points selected by user
  • cgGeoTooltips - Appends geocoordinate lat/longs to the tooltip when touching an entity
  • cgStatus - Displays information about CAD Geodesy Assistant and important settings of the drawing

cgGeoDist - Geodetic Information from two points

This is a CAD command that will ask the user to select two points so that geodetic information can be displayed to the CAD command window. The following information is displayed:

  • - Distance: Shown in the units of the underlying coordinate system assigned to the drawing
  • - Azimuth: Forward, shown in Degrees
  • - Azimuth: Reverse, shown in Degrees
  • - Delta X & Y: The grid/cartesian coodinate distance between the first and second points
  • - CAD X & Y coordinates which would be the underlying grid coordinate system values
  • - Geocoordinate Latitude & Longitude values shown in Degrees, Minutes and Seconds

This command work in a simular way to the MAPDIST command in MAP3D. The number of decimal places depends on the value of the CAD LUPREC system variable. Below is an example of the command line output:

cgGeoDistExample

cgGeoTooltips - Adds Latitude/Longitude coordinate values to tooltips

This is a CAD command that toggles if Latitude/Longitude coordinates are displayed in the CAD tooltip when the cursor is above an entity. The list below shows the entity type along with which keypoint coordinates are shown:

  • - Circle: Centre point of circle

The number of decimal places depends on the value of the CAD LUPREC system variable. Below is an example of the tooltip showing the geographical coordinate of the centre of the circle entity:

cgGeoTooltipExample

cgStatus - Shows information about CAD Geodesy Assistant and settings in the drawing

This command will display the version numbers of CAD Geodesy Assistant and the suppporting DLL known as FPAssistant (this does all the geodetic math).

This will also display the details of the coordinate system assigned to the current DWG in XML which means it can be copied from the CAD command window to WIndows clipboard.