DK - Geographic Coordinate Systems, Reprojecting...
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Q10619 -  What naming scheme is used in DK (and other TatukGIS products) for the supported datums & projections? At present TatukGIS products use GEOTRANS names, as are listed below. The DK version 9 will introduce ehanced coordinate system support which uses WKT/OpenGIS naming. The ... (Modified: 2008-02-26)

Q10547 -  My project consists of a TIFF aerial image layer and a SHP file vector layer, but the two files do not even overlap when opened in the DK viewer, even though the two files are of the same terrain. I suppose that this is becuase the layers are in different coordinate systems. How can I handle this ... (Modified: 2004-12-14)

Q10245 -  Explain the logic for using the DK to reproject, on-th-fly, a SHP layer to a different geographic coordinate system for presentation in the viewer? How are the lat/long plots handled in the other VectorLayers? Does on-the-fly reprojection badly affect performance? (In a competing product that I was ... (Modified: 2004-12-14)

Q10248 -  How I can use the DK to convert a vector layer containing points that were collected from a GPS device so that they properly fit my shape vector map layer, which is on the Transverse Mercator projection? The DK may be used to project an unprojected map layer (such as one containing points collected ... (Modified: 2005-12-09)

Q10651 - Would you provide a whole sample showing the conversion (reprojection) to & from the UTM in Visual Basic 6? This sample in VB 6 shows the reprojection to/from the UTM (Universal Transverse Mercator) projection with coordinates in the Singapore zone: Dim ProjectionList As New XGIS_ProjectionList Dim ... (Modified: 2005-10-21)

Q10244 -  We will use the Geographic Projection UTM with the Mexican DATUM (ITRF82) Does the DK support this datum? No, the DK supports approximately 225 datums, but it does not presently support this particular datum. If you will provide us with the specifications for this datum, we will add support for it ... (Modified: 2003-11-21)

Q10585 -  Does the DK support the Australian GDA 94 (Griding Datum of Australia 94) geographic coordinate system? Prior to the DK v.8 final release version, the GDA 94 coordinate system is not directly supported as a simple selection item, but support for GDA 94 can be easily added to a DK application with ... (Modified: 2004-12-22)

Q10298 -  How do I use the DK Scale property? Use of the Scale property requires that you assign map units (such as meters, feet, nautical miles, radians, etc. to the subject map layer. Attach: GIS_ViewerWND1.Units.Units : gisUnitsTypeMeter ; and then, for example: GIS.Scale : 1 ( means 1 meter on the screen ... (Modified: 2007-07-02)

Q10246 -  What is TGIS_Units and how can I use it? TGIS_Units is a unit conversion component relating to projections. It will allow you, for example, to determine whether your output is in meters or miles. You can use this class to convert between unit types. Conversion from meters to nautical miles, for exam ... (Modified: 2007-07-05)

Q10275 -  Can I use the DK to georeference (not rectify) a TIFF file? Yes. There are two options. Option One = Create a *TFW file (also known as a world file) which is a plain text file. If the *TFW file is named exactly the same as the associated tiff file, and saved to the same file folder as the *TIF file, ... (Modified: 2005-04-18)

Q10330 -  I need to project some unprojected point coordinates to a coordinate system in order to use the point data in distance calculations. Any ideas on how do most easily project my point data? If the number of points is limited, the easiest way to project the points to a projected coordinate system is ... (Modified: 2004-12-14)

Q10423 -  What file endings are used in TatukGIS products for World Files, which contain image registration (coordinate system georeferencing) information about an associated image? TatukGIS products follow generally accepted rules for World File endings. The World File naming convention is First + Last Lette ... (Modified: 2004-04-12)

Q10464 -  I want to load a GeoTIFF that is in a projected geographic coordinate system, and then be able to click on the image and see the coordinates in plain latitude/longitude (x,y) decimal/degrees (WGS 84, geodetic/upprojected) How can I do this with the DK? Step 1: Convert the projected screen coordinate ... (Modified: 2006-05-23)

Q10679 -  How can I get shape WKT geometry in a given projection? Implement this function: function MyExportToWKT( const _shp : TGIS_Shape ) : String ; var tmp : TGIS_Shape ; i,j : Integer ; begin tmp : _shp.CreateCopy ; try tmp.Lock( gisLockInternal ) try tmp.Reset ; for j : 0 to _shp.GetNumParts - 1 do begi ... (Modified: 2006-02-08)