Clicking on the
File/Export to image menu item provides the means for creating a new image (and digital elevation / grid) file in a number of supported formats. The export is generated from the current map project i.e. from all open layers - so an exported image can be generated from just one layer or from many layers. The image is exported in the Map area coordinate system, so this feature is appropriate for converting images between coordinate systems. Because the image export is size unlimited, the
File/Export to image function can be used to mosaic multiple layers into a single image file.
To maximize compatibility with non-TatukGIS software programs, the Editor saves the coordinate system information for an exported image:
PRJ, TAB, and World Files are saved to the same file folder as the exported image file.
To export any extent of the current project as an image file
Select extent/Visibleoption later in this procedure. To take advantage of this option, adjust the extent visible within the Map area using the Zoom mode, Zoom extended mode and Drag mode features.
File/Export to imagemenu item - this invokes the
Save Asdialog box.
Save Asdialog box, go to the drive on which you want to store the image.
Save as typelist.
Savebutton - this invokes the
Export to [chosen format]dialog box, where the chosen format is the format selected in the
Save as typelist in the previous step.
Export to [chosen format]dialog box allows to adjust the image parameters: level of compression (Compression box), resolution (Resolution box) and extent to export (Select extent box).
Compressionbox together with the
Resolutionbox provide the quality vs. file size settings. While the resolution setting affects the physical size of the image, the level of compression defines the precision to which the exported image reflects the actual data. The higher the compression level, the smaller the exported file.
Resolutionoptions (which influences the export file size) present a choice of three predefined resolutions: best quality (if the source data is vector, this setting sets a width of 4,000 pixels), for document (300 DPI with a width of 14 cm), and for web (600 pixels in the width). The fourth
custom, which allows the user to custom define the export width, height, and DPI (dots per inch).
Select extentsettings are used to define the extent of the source map to be exported. The extent options are
Full(the exported image is to be generated from the entire map extent),
Visible(the export is generated only from the currently visible extent),
User defined(the export extend is defined by entering coordinate values to define the top, bottom, right, and left limits of the extent), and
Spatial selection(active only if a spatial selection has been performed on a vector layer using any of the spatial selection tools before invoking the
Export to imagefeature. The spatial selection tools are: Select by Polygon, Select by Circle, Select by Rectangle, Select by Clipboard.
File/Exportto image feature to export the image.