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The module for spatial data capture and edit includes digitizing 
on tablet, vectorization from scanned maps, data editing, snap 
to node, topology building and error check, edge matching, 
input and edit attributes, and other functions. 
The image processing module has the functions including 
radiometric corrections, sensor corrections, merge data set, 
geometric corrections, filtering, contrast stretch, color domain 
conversions, density slicing, histogram, histogram equalization, 
mosaic, band radios, supervised classification and unsupervised 
classification. 
The third module is specially for desktop mapping and spatial 
query. It can be used to make maps that involve graph and 
tables of quering result. Queries from both directions are 
available. User can query the attributes of a spatial objects by 
cursor, and from the other side, user might get a tables and a set 
of objects by selection query. 
The spatial analysis functions in GeoStar are divided into two 
modules. The two-dimensional analysis model is responsible 
for buffer analysis, network analysis, polygon overlay, point in 
polygon, line in polygon and other. operations. While the DTM 
and application module provides TIN and GRID generations 
and surface analysis functions such as generating perspective 
view, generating contours, generating line-of-sight, generating 
cross-sections, and generating fractal visualization surface. 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
     
  
  
    
Analytic „OLE Le Microsoft 
Aerial Applications developed by Users : : Office 
Triangulation | rm AT : 
with GPS i vod ejje 
Application Examples dd Opp s 
Spatial Vector Data Desktop DEM and 
GPS DPS RS Analysis Capture Mapping Applications 
and Editing 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
ODBC Object-oriented Database Engine| | Open GIS 
Oracle dBasc Sybase | | Ingres | |. Arc/Info | | MGE | |Genamap| |...... 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Figure 4 The modules and design framework of GeoStar 
303 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996