Knowledge Base

KB10558 - TIFF files exported slowly.

The tradeoff is TatukGIS software exports full sized TIFF images, i.e., with no size reduction and no quality loss from the source imagery. The Editor can export even HUGE (such as 2 GB) TIFF files. Other software programs may export TIFF's more quickly but with substantially reduced size and degraded resolution.

Modified: September 10, 2015

KB10552 - Access DXF AutoCAD layer in the DK.

Use: layer_name := shp.GetField( 'DXF_LAYER' ) ;

Modified: September 10, 2015

KB10546 - Problem with the GIS.Zoom (pixels verus twips).

Question from a DK customer: In my project file I have: [TatukGIS Layer1] Path=layer.shp Name=cities Visible = false [TatukGIS Layer1 1] MinZoom=340 Visible=true The Layer becomes visible even if GIS.Zoom reports only 27. What's wrong? Specify instead: MinZoom=-3000 Negative values correspond to PIXEL related calculations (such as GIS.Zoom). Positive values correspond to TWIPS related calculations (such as GIS.ZoomEx).

Modified: September 10, 2015

KB10543 - Documentation for CGM symbol ASCII text file format.

Documentation for the ASCII text file format can be found under different names from these sources: 1) NIMA: MIL-STD-2301A www.nima.mil 2) ISO: INCITS/ISO/IEC 8632-4-199 http://webstore.ansi.org/default.aspx 3) Download from: http://www.directory.net/Science/Reference/Standards/

Modified: September 10, 2015

KB10533 - How to check if two shapes are duplicated, i.e., have the same geometry.

Use: Shape1.Relate( shape2, RELATE_EQUALITY ) ;

Modified: September 10, 2015

KB10534 - Label width problem when printing.

Probably you have a project/ini file in the which width was specified in pixels and this width was recalculated to 75pt but is still stored as pixels. Try "touching" the value (change the size up and down) in the properties dialog box and click Apply button to reset the properties.

Modified: September 10, 2015

KB10532 - Present legend in reverse order, with max value at top and min value at bottom.

Suppose that you had entered: Minimum Value = 1000 Maximum Value = 5000 Instead, just reverse the values: Minimum Value = 5000 Maximum Value = 1000

Modified: September 10, 2015

KB10638 - Customize DK map zooming behavior.

Properly handle the MouseDown & MouseUp events - on MouseDown store VisibleExtent and on MouseUp verify that VisibleExtent is the same. If the extent is the same, then zooming did not occur. The following example makes zooming in a by factor of 2 when user clicks on the map. procedure TfrmMain.GISMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer); begin if GIS.IsEmpty then exit ; if GIS.Mode = gisZoom then begin oldExtent := GIS.VisibleExtent ; ex ...

Modified: September 10, 2015

KB10599 - List all field names from a joined dataset.

This can be done as follows: if Assigned( oLayer.JoinDB ) then begin for i:=0 to oLayer.JoinDB.FieldCount-1 do begin name := oLayer.JoinDB.Fields[i].DisplayName ; .... end ; end ; if Assigned( oLayer.JoinADO ) then begin for i:=0 to oLayer.JoinADO.Fields.Count-1 do begin name := oLayer.JoinADO.Fields.Item[i].Name ; ... end ; end ;

Modified: September 10, 2015

KB10584 - Present label for only a single object in a layer.

Make the shape/object editable, as follows: shp = shp.MakeEditable shp.Param.Label.Value = 'label'

Modified: September 10, 2015

KB10536 - Develop plain C++ application using XDK with Visual Studio.

Here is a simple console application using the TatukGIS DK-ActiveX (XDK): #include "stdafx.h" #import "msado15.dll" #import "Stdole2.tlb" rename_namespace("TatukGIS_DK") // patch for VS6 bug #import "TatukGIS_DK.ocx" #include "stdio.h" int main(int argc, char* argv[]) { CoInitialize( NULL ) ; TatukGIS_DK::IXGIS_UtilsPtr utils ; TatukGIS_DK::IXGIS_PointPtr ptg ; utils.CreateInstance( "TatukGIS_DK.XGIS_Utils" ) ; ptg = utils->GisPoint( 12, 34 ) ; printf( "x = %f, y=%f", ptg->X, p ...

Modified: September 10, 2015

KB10530 - Determine if layer is vector without using the InheritsFrom() function.

You can try to test inheritance using a procedure like the following: function IsInherited(const _object: TObject; const _name: WideString): Boolen; var obj: TObject; ref: TClass; txt: string; begin Result := False; if not Assigned(_object) then exit; ref := obj.ClassType; while (ref <> nil) and (not Result) do begin Result := ref.ClassNameIs(txt); ref := ref.ClassParent; end; end; And test inheritance from TGIS_LayerVector using IsInerited( my_object, "TGIS_Lay ...

Modified: September 10, 2015

KB10357 - Size of a PixelStore export relative to TIFF format source image(s).

This depends on i) whether the source images are 24 bit with unlimited colors or 2, 4, or 8 bit with limited colors ii) the PixelStore internal format used (8 or 24 bit JPEG or 1, 4, 8, or 24 bit PNG) and iii) the PixelStore compression level setting. For example, export of 24 bit TIFF aerial photos to a PixelStore 24 bit JPEG layer with the default JPEG compression setting would likely result in a PixelStore layer that is much smaller than the source data. (The size reduction, along with some quality ...

Modified: September 10, 2015

KB10352 - Exported TIFF image larger than TIFF source data.

There is no inherent reason why the file size of an exported TIFF image must be larger than the size of the corresponding source TIFF data. A size increase could be explained by one of the following: The source image(s) are somehow compressed or less than 24 bit color, whereas the TIFF export was generated without compression or (unnecessarily) to full 24 bits. TatukGIS software supports TIFF export with LZW compression and export to 2, 4, or 8 bits, so consider these image export options. The sour ...

Modified: September 10, 2015

KB10351 - Export limited color (less than 24 bit) TIFF aerial image to PixelStore of minimum size.

Select the same number of bits for the internal format of the PixelStore export as your source image(s). The TatukGIS PixelStore format internally supports 8 and 24 bit JPEG and 1, 4, 8, and 24 bit PNG. This will prevent the exported PixelStore image from being larger than necessary.

Modified: September 10, 2015

KB10345 - Georeference scanned topological map using coordinate information available on the map.

This is possible, provided you know the coordinate system of the coordinates. Generally coordinates printed on physical maps are in longitude/latitude decimals or degrees.

Modified: September 10, 2015

KB10286 - Support for printing and other hard copy output.

The DK supports all Windows graphics printers. Maps can be exported to raster image formats, e.g., BMP, TIFF (GeoTIFF), PNG, and JPEG. Print-preview functionality is supported as are print templates. The DK also provides for high resolution printing to PDF document files with use of a 3rd party component. Refer to Knowledge Base KB10551 for more information about the PDF support.

Modified: September 10, 2015

KB10159 - Control overlapping image situations when mosaiking muilple images.

The ranking hierarchy of the images in overlapping areas is consistent with the order of the images in the project. So the export is consistent with the appearance in the map window. Images can be easily reordered by simply dragging the layer in the Legend panel to the new position.

Modified: September 10, 2015

KB10603 - Supported file type not presented in GisSupportedFiles dropdown list.

The problem is TatukGIS software supports more file formats than the standard Windows OpenFileName dialog box dropdown list is capable of filtering. The standard dropdown list for a single filter is limited to approximately 256 characters (corresponding to the sum of the characters composing all the file endings of supported formats). File extensions composed of characters beyond the limit are ignored and not presented. Therefore, if a TatukGIS supported file format is not visible under the "Common fi ...

Modified: September 08, 2015

KB10650 - Problem connecting to MySQL database from more than one computer.

Verify that you are not using the user "ROOT". User "ROOT is by default restricted only to the local host connection. As long as the same connection parameters are used (the layer name is only different for a TTKLS file), multiple computers/users are able to share the same database connection. If you provide a different password for each connection, as many connections are possible as there are variations of your connection string.

Modified: September 08, 2015

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