This represents another operating mode with TransLT where you can quickly draw a polygon (parcel) in Google Earth using directly the coordinates of a projection system. The transformation of the coordinates from the projection system into geographical coordinates (φ, λ) on the WGS84 or ETR89 (GRS80) ellipsoid is made using one of the models of transformation from the models list.

This command can be used only if in the PdrawGE folder, which is in the folder where TransLT is installed, there are one or more files with transformation models, files with mtr or mtrs extension that contain models that transform the coordinates from the projection system into geographical coordinates. If the installer did not copy these files or if you want to add them to the models list, copy in this folder the files with transformation models that are used in the country or area where you work.

The command is easy to use, drawing a polygon (parcel) in Google Earth can be made by users who have no knowledge of geodesy, such as real estate agents, bank officials, landowners, etc. For example, to draw a parcel whose cadastral coordinates are known in the national projection system you must choose from the list of models the model that has as initial coordinate system the national projection system and then you must type into the table the coordinates observing the North and East axes.

To view you must have Google Earth installed, otherwise you can just save the data in csv or xml file (TransLT format), kml file (Google Earth format) or kmz file (compressed Google Earth format).

The description of the settings that apply to the drawing of all entities can be found at Options - Google Earth drawings Tab.

General

Place name

Introduce the name of the place, text that is used to identify the file loaded in Google Earth in the folder Temporary Places.

Transformation model

Select from the list the transformation model that has as initial coordinate system the projection system in which you want to enter the coordinates.

This list supports models that perform the transformation from coordinates from the projection system into geographical coordinates or reversible models that perform the transformation from geographical coordinates into coordinates from the projection system. The direction of the transformation is automatically selected and the initial system is always the projection system.

Epoch of the dynamic coordinates

Enter manually the year with decimals or select the date from the calendar. This box is active only for the time-dependent transformation models.

Coordinates: ...

The coordinates can be entered manually in the table, loaded from a file or copied from another table. The coordinates from the table can be saved to the file or can be exported to Microsoft Word or Microsoft Excel. The description of the buttons and of the contextual menu of tables can be found at The commands of the coordinate tables.

It is not necessary for the final point to be identical with the first one to close the polygon.

Button Select whether or not the polygon area and perimeter is calculated

It sets whether the area and the perimeter of the polygon are calculated at the end of the coordinate table editing or at the loading of the coordinates from file.

Polygon properties

The description of the properties of an entity can be found at Draw in Google Earth - Selected entity.

Number

Enter the land register’s number or an identifcation number.

Description

Enter the owner’s name or a polygon’s description.

Area

Enter the value of the polygon's area or, if the automatically calculation mode is selected, do not change the calculated value.

Perimeter

Enter the value of the polygon’s perimeter or, if the automatically calculation mode is selected, do not change the calculated value.

Display information about the entity in the balloon description

The description about displaying this information can be found at Draw in Google Earth - Display information about ....

Draw the contour points

By checking this box the contour points will be drawn in Google Earth. The description of the drawing points properties can be found at Draw in Google Earth - Selected entity.

Buttons

Button Save to file

It saves the entity in csv file (TransLT format), kml file (Google Earth format) or kmz file (compressed Google Earth format). The files saved with the extension kml or kmz can be loaded in Google Earth by opening them from Windows Explorer or they can be mailed to other persons to show, for example, the position of a property in Google Earth.

For csv files the coordinates are saved in geographical coordinate system so that the coordinate transformation is no longer necessary when loading the csv file in The window of drawing in Google Earth.

Button Draw in Google Earth

It opens Google Earth and displays the polygon.