Specification

There are two basic areas covered by following technical specification:

• MOSS4G Framework - foundation libraries available for Windows CE applications development
• MOSSMAP - main end-user application based on the MOSS4G Framework dedicated for Windows Mobile 5.0+ for Pocket PC and Smartphone

General Features

• MOSS4G is based on ​Open Source Software / Free Software
• Target platform
  • ​Windows CE 5.0 and higher (Windows Mobile 5.0+ for Pocket PC and Smartphone)
  • in future, it should be possible to support other mobile platforms like Linux or Symbian, on volunteer basis
• Standard PDA Hardware as of 2007
• Internet connection: GPRS IP connection (not always online) or 3G IP connection (ie. CDMA2000 Verizon 3G, mostly online)
• I18N support
• OGC protocols support: WMS, WFS, WPS
• Vector and raster formats support using ​GDAL library
• GPS support for navigation and vector editing

MOSSMAP Application Features

Map Management

• Load map from project file
• Save map to project file
• Import/Export map from MapServer file
• Publish map to remote Web server
• Upload complete map to remove server

  A project includes the shapefile with the digitized polygones, the corresponding cache and one or more simple files (like PDF).
  The uploading process has to use authentication.
  A simple web form could be used to do the uploading (perhaps package all files in a specfic way into one .zip file and
  upload this single file - the server will know that to do with it)
  

• Consideration of on-fly projection of layers added to a map
  • Selection of map projection (default: projection of a first layer)
  • Projection definition for each layer
  • Consideration of projection defined for GeoTiff? or Shapefile (.prj file)

Layer Management

• Add/Remove layer
• Toggle layer visibility in current view
• Reorder layers

Vector layer

• Layer style customization
• Features classification based on value of selected attribute using:
  • Single symbol
  • Graduated symbol
  • Continuous symbol
  • Unique symbol

• Formats:
  • ESRI Shapefile
  • WFS

Raster layer

• Data formats:
  • GeoTIFF
    • single (Just one tiff for one layer)
    • tiled (many images form a single layer ... shape file indexing or tile cache)
  • WMS

• Cache tool:

  Tool to cache a area to be specified on a WMS layer (x meters around a point) onto local storage so that it creates and stores a "map" file as well.
  Use WMS and WFS request to download bitmaps and vector data (stored as Shapefile) - names etc. are to be hardcoded.
  It must be possible to give each of these caches a name. It will represent a directory.
  Option to delete caches (dialog with a list, you can pick one or many and press a "remove" button.
  

Navigation

• Zoom-in
• Zoom-out
• Zoom to extent of all layers
• Zoom to extent of selected layer
• Pan
• Query vector feature (display attributes)
• Measurement tools: distance, area
• Scale:
  • as a scale bar
  • in textual form

Routing

• Using OGC WPS protocol implemented with PyWPS Route Path
• LOS calculations

Features Editing

• Add/Remove point
• Add/Remove line
• Add/Remove polygon
• Add/Move/Remove vertices
  • Capture coordinates from GPS
• Edit attributes
• Save digitized feature

GPS Support

• Show current GPS position
  • graphical cursor in map window
  • latitude/longitude/altitude in textual form
• Show GPS diagnostics details
• Capture and store GPS track to a file
• Waypoints management support
  • Retrieve and display waypoints from GPS unit
  • Store waypoints in a file
  • Send waypoints through WFS-T
• Import/Export GPX
• GPSI