LandSerf 2.3: Changes Since 2.3 Preview

New functionality

• Added US Albers equal area projections, both conterminous and all states versions.
• Colour table files can now indicate 'raw' colour values.
• Added load/save option to vector appearance box.
• Pit removal now has choice of pit flooding or outflow channelling.
• Non-rasterized flow magnitude calculation with optional flow vectors now available.

LandScript:

• LandScript draw() can now draw both primary and secondary vector maps rather than just a single vector map.
• Added vectorstyle() as a LandScript command for setting vector drawing styles for the LandScript draw() and save() commands.
• Added vector map algebra processing to LandScript.
• Added multiscale option to LandScript surfparam() command.
• Added compare() function to LandScript for string comparison and matching.
• LandScript map algebra now uses active attribute in attribute tables if present.
• Added noTable option to the LandScript edit() command for removing attribute tables from spatial objects.
• Added ability for LandScript to save colour tables and attribute tables.
• Enhanced the LandScript echo() command to allow writing to a text file and with newline and tab control characters.
• Added freqdist() command to LandScript to allow frequency and hammock distributions to be output.
• Added peakclass() command to LandScript to allow peak classification.
• Added quote(), strlen() and substring() LandScript functions.
• LandScript version() can now display more detailed information about the version of LandScript and Java VM.
• LandScript ifelse() function can now return values of any type.

User interface changes

• LandScript editor now fully exits the application if called directly and only prompts for closing if there are unsaved edits.
• LandScript editor now highlights variables that use the underscore modifier.
• Appearance of text, including option to size text, now improved in LandScript editor.
• Calls to the GUI version of the LandScript engine without specifying initial data now results in simple header being inserted into blank script.
• Graphics now scale to vector map only if raster is selected but not displayed.
• Vector appearance now remembers boundary colour when no boundary is set.
• Improved speed and quality of vector thumbnail drawing.
• Vector display no longer displays labels (or symbols) for any object with a NO_VALUE attribute.
• Console now appears to the right of the main LandSerf window and can be toggled on and off with the ctrl/cmd-K key.
• Numerous minor changes to improve consistency of GUI.

Bug fixes/enhancements

• Corrected bug that would sometimes mis-transform vector polygons after repeated redrawing.
• Corrected bug that prevented Albers to lat/long transformation from working correctly.
• SVG output can now draw labels.
• SVG output now respects all vector drawing styles with the exception of 'surround lines' and fixed line/point (which has no meaning for non-zooming output).
• Corrected bug in attribute table that could sometimes fail to validate columns with mixed numeric and text values.
• Corrected bug in shapefile writer that would fail if attribute table not valid.
• Corrected bug in Shapefile writer that would sometimes give incorrect file size in header for area and polyline objects.
• Improved KML export to account for polygons with multiple exterior rings.
• Improved robustness of GPX reader to allow elements with missing attributes to be processed.
• Removed bug in shapefile writing of polygons with multiple parts and improved error reporting of shapefile import.
• Saving a graphics image no longer produces error if vectors only are in display.
• Corrected bug that prevented generic point files being read in LandScript.
• Corrected bug that could sometimes result in rounding errors when calculating standard deviation in multiscale parameter selection.
• Corrected bug in multiscale parameter calculation that failed to provide min/max values for feature types, residuals and fractal dimension if selected.
• Corrected bug in LandScript surfparm() which assumed radians rather than degrees for slope tolerance.
• Corrected bug in LandScript where a change in contents of a scalar variable to a spatial object generated an error.
• Corrected LandScript bug that reset evaluation stack when function arguments contained other function calls. This was only a problem when the argument was not the first in a function call.
• Non-jpeg image files now represent null value as transparent pixels.
• Corrected bug that sometimes did not rasterize points when converting from vector to raster.
• Corrected bug in FrenchNTF projection that used wrong ellipsoid for longitude projection.
• Corrected bug where min/max vector values could be NO_VALUE if first point was null.
• Added help for 'function', 'clear', 'if' and 'while' in LandScript.
• Corrected bug where clicking on an existing vector while rectifying resets the control point display styles.
• Improved ridge traversal for peak classification to use shortest path where two paths have same height change.
• Removed bug whereby projection information was lost when creating pitless surfaces.
• Pit removal now accounts for null borders around rasters.
• Error reporting improved providing more detail.

API changes/enhancements (for programmers)

• Added getNodeElements() to DOMProcessor to allow breadth-first searches of a DOM tree and renameElement() method for renaming tags.
• Numerous minor improvements to API documentation.
• Added nearestPoint() method to Segment class for calculating nearest point between segment and an arbitrary 2d point.
• Refactored vector display preferences to use a single class that encapsulates rendering styles. Note API change now forces this new VectorStyles class to be used rather than setting/getting individual styles in GraphicsArea, VectAppearanceBox etc.
• Exposed scripting classes used by ScriptEngine.
• Renamed getParamAverageSurf() and getParamVariationSurf() to getSummarySurf1() and getSummarySurf2() to reflect the fact that they could also return min/max surfaces.
• Used latest Jogl 1.1.1 libraries (May 2008) and changed 3d viewer to use a lightweight GLJPanel rather than heavyweight GLJCanvas. This now works with Java 6. Reintroduced multi-texture rendering to provide compatibility with older OpenGL drivers.
• Improved isOpenPolygon() in GISVector to account for multi-part polygons.
• Moved Alloy look and feel settings to separate class to allow decoupling of the LandSerf class from its look and feel.

Earlier Changes

• Changes from 2.2 to 2.3 Preview
• Changes from 2.1 to 2.2
• Changes from 2.0 to 2.1
• Changes from 1.8 to 2.0
• Changes prior to 1.8