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OpenGIS WKT (Well Known Text representation of geometry) is a human readable text format specification used to represent the geometry of a GIS shape, e.g., polygon, polyline, point, multi-point, and some other geometric objects. An example of a WKT string representing a simple polygon formed by four vertices (with coordinate values rounded to one decimal place) is: POLYGON ((30.4 10.2, 40.0 40.0, 20.7 40.0, 10.2 20.5, 30.4 10.2)) WKT format is typically used for the interchange of...

Windows XP is a desupported product by Microsoft. The DK setup routine, indeed, requires a more recent version of Windows. We strongly suggest using VB6 on a more recent version of Windows. DK ActiveX created applications, never-the-less, can run on Windows XP. Just keep in mind Windows XP limitations, such as accessing https:// (SSL) webservices. You can follow www.youtube.com/watch?v=G_HhwD0ZptM to learn how to install VB6 on Windows 11. If that is not an option, drop an email to...

The most likely cause of the problem the webservices are utilizing https:// (SSL) protocol. Recent SSL certificates are not compatible with Windows XP (which is desupported by Microsoft). If you are forced to use Windows XP, the only solution is to access http:// , when available.

The program is unable to copy the Sample Data Set into c:\Users\Public\Documents folder. This issue can potentially occur with older versions of the DK and GIS Editor products. The most common reason for this is the Windows "Controlled Folders" setting. The easiest workaround is to temporarily disable this feature at the time of installing the TatukGIS software. Refer to Microsoft guidance provided at: Controlled folder access. Alternatively, unselecting Sample Data from the installation...

Basemap layer A continuous group of layers located at the bottom of the map (i.e., held in the lowest layer(s) of the map project) with layer.Basemap=True. Such group of layers are rendered in a background thread, independently of the rest of the map. Therefore, viewer methods InvalidateTopmost and InvalidateWholeMap have no effect on a basemap layer. Basemaps are great, for example, presenting webtile layers. Topmost layer A continuous group of layers located at the top of the map (i.e...

In additional to the extensive multi-country road and highway shields library provided by TatukGIS, anyone can use their own SVG format shields (and other symbols) in TatukGIS projects or incorporate their own symbols library into the software. Refer to the guidance on this topic provided at the following pages of the DK online documentation. SVG Shield Construction (how to create a shield symbol) SVG Symbol Library Compiler (create a user-defined SVG symbols library) SVG Symbol Library...

If any ScreenToMap or MapToScreen is used when drawing a basemap, the results can be unpredictable. The reason is the typical call GIS.ScreenToMap() cannot be used because basemap uses its own viewer to draw in a background thread. A workaround is use _shape.LayerViewer.ScreenToMap like in the following sample Delphi code snippet (similar logic with all platforms). procedure TForm1.doLabelPos( _sender : TObject ; _shape : TGIS_Shape ; _pos : TGIS_LabelPosition ; var _pt : TPoint...

It is possible to use the Developer Kernel for ActiveX edition within PowerShell. Doing this requires that a 32-bit (x86) version of PowerShell be started. Sample code: #activate $utils = new-object -COMObject "TatukGIS_XDK11.TGIS_Utils" $utils.SetLicense(YOUR ACTICATION CODE) #create a viewer and draw a map $vwr = new-object -COMObject "TatukGIS_XDK11.TGIS_ViewerBmp" $vwr.SetSize( 512, 512 ) $vwr.Open( "c:\Users\Public\Documents\TatukGIS\Data\Samples11\World\WorldDCW\world.shp" )...