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Sigis from Geomatique Sigisco

Mapping Digitizing Software

 

 

"A COMPLETE TOOL FOR A COMPLEX WORLD"

SIGIS® is a brand new geomatic software integrating fields such as:

  • Satellites Image Processing
  • Raster Spatial Analysis
  • Acquisition, Structuration and Analysis of Vector Data
  • Geographically Linked Database Management
  • Spatial Modelisation
  • Desktop Mapping
  • 3D Rendering

Until now, the range of functions offered by SIGIS were available only through the acquisition of many different software. This render the project management process both difficult and costly. Operating within the Windows 95/98/NT/ME/2000/XP plateform, SIGIS combines powerfull algorythm with a user friendly interface. Tested in collaboration with Universities for more than 4 years, it is now available.

FUNCTIONS

Display :

  • Interactive colour palette edition and saving.
  • Red-Green-Blue display using 3 separated colour planes + panchromatic (BMP saving capability).
  • Contrast variation with linear stretching.
  • Multiple vector maps superposition.
  • Display and edition of vector map object labels within the graphic monitor.
  • Vector display control parameters:
    • Database selection of label variables and fonts.
    • Display object centroids.
    • Display polylines direction.
    • Display topological vector map polylines connectivity.
    • Display vector map within range of scale.
  • Mask activation on display.
  • Zoom (in and out).
  • Distance measurements on mouse click.
  • Multiple graphic monitor display.
  • Dynamic reprojection of vector maps in current graphic monitor.
  • Interactive display of 3D surfaces.

Information :

  • Frequency histograms.
  • Raster file Statistics.
  • List of vector and raster files.
  • Internal file format information.

Geometrical rectification :

  • Control points acquisition on mouse click, keyboard or digitizer tablet.
  • Rectification of raster/vector file using linear polynomial , quadratic or cubic model.
  • Rectification of raster/vector file using 3 interpolation methods : nearest neighbour, bilinear interpolation or cubic convolution.

Filters :

  • Pre-defined or user-defined filter of uneven dimensions.
  • Modal filter.
  • Median filter.

Classification :

  • Training sites acquisition on monitor.
  • Object classes spectral signature generation and display.
  • Spectral bands group creation.
  • Scatter diagram display.
  • Object classes separability evaluation.
  • Texture analysis.
  • Supervised classification using the following methods:
    • Parallelepiped.
    • Minimum distance.
    • Maximum Likelihood.
  • Unsupervised classification (K-Means).
  • Classification results validation with confusion matrix.
  • Automatic legend creation of classified map (with interactive edition).

Raster image importation :

  • Binary RAW format.
  • IDRISI format.
  • Arc/info ascii raster format.
  • Vertical Mapper ascii format.
  • BMP format.

Raster image exportation:

  • IDRISI format.
  • BMP format.

Map Algebra :

  • Calculator using the following functions with raster matrix of different pixel resolution and complete or partial superposition in combination with numerical values. Mask usage for Boolean (1/0) operations.
    • Addition
    • Soustraction
    • Multiplication
    • Division
    • Trigonometric functions.

Raster Spatial Analysis:

  • Dynamical matrix resampling upon region and resolution changes.
  • Mask usage for Boolean (1/0) operations.
  • Raster values supported : Octal type (0 to 255, 8 bit) signed (-32768 to 32767, 16 bit) and unsigned integer type (0 to 65535, 16 bit), long signed integer type (-2147483648 to 2147483647, 32 bit) and float type (1.2e-38 to 1.2e38, 32 bit).
  • Matrix reclassification.
  • Linear stretching.
  • Radiometric image calibration.
  • Cross tabulation and cross classification.
  • Buffer zone.
  • Surface interpolation :
    • Moving average over inverse distancen weighting method (user-defined exponent n and neighbour numbers).
    • Trend surface production.
    • Thiessen's polygon production.
    • New contour elevation lines based method.
  • Individualisation of group of same value contiguous pixels (Clump).
  • Multiple raster mosaic creation.
  • Distance map.
  • Cumulative cost map.
  • Optimum vectorial pathway generation.
  • Dispersion simulation.
  • DEM
    • Flood simulation.
    • Shade relief map.
    • Spherical model map.
    • Visibility map
    • Crest search.
    • Obstruction map.
    • Watershed map.
    • Profil creation.
    • Slope and aspect map creation.
  • Area raster creation or report.
  • Raster-Vector conversions with Database creation.
    • Points conversion.
    • Polylines conversion.
    • Polygons conversion : Complete region generation with included (island) and excluded (lake) areas.
    • Polygon contours conversion.

Vector Processing :

  • Acquisition of points, polylines and polygons directly in graphic monitor.
  • Acquisition of points, polylines and polygons using digitizer tablet.
    • WinTab digitizer driver compliant.
  • GPS (Garmin) support in real time mode.
  • Object information :
    • Perimeters and areas.
    • Centroïds , position, number of nodes.
  • Graphical attributes edition (colours, line types, fill, symbols, etc).
  • Topological manipulation of objects.
    • Node edition.
    • Line segmentation.
    • Polygons construction from a set of lines or points.
    • Regions construction (islands and lakes) from a set of polygons.
  • Vector files importation :
    • MapInfo MID/MIF.
    • Autocad DXF.
    • Arcview SHAPE.
    • IDRISI.
    • ascii DCW.
    • ASCII x y z.
  • Vector files exportation :
    • MapInfo MID/MIF.
    • HTML.
    • IDRISI.
  • Multiple layers superposition.
  • Vector-Raster conversions.
  • Database manager dynamically linked to vector layer.
  • Thematic mapping (Class intervals, Proportional symbols, Line density) with automatic generation of corresponding legend.
  • Automatic topological construction :
    • Line segmentation and snapping.
    • Common nodes generation.
    • Network connectivity generation.
    • Polygons and regions construction (with islands and lakes)
  • Delaunay triangulation.

Database Manager :

  • Dynamic relations update between vector objects and database record.
  • Selection of records based on user-defined value sets.
  • Variable update based on an arithmetic combination of variable values and functions.
  • Geographic search of selected record corresponding object in the display.
  • Database update from raster file values.
  • Database value transfer in analysis and in vector/raster or raster/vector conversion.
  • Database georeference.
  • Descriptive statistics.
  • Calculator:
    • Addition
    • Soustraction
    • Multiplication
    • Division
    • Geometrical functions.
    • Trigonometric functions.

Georeference :

  • Continuous geographical universe for all data types.
  • Supported projections :
    • Universal Transverse Mercator (UTM).
    • Universal Transverse Mercator Modified for Quebec (MTM).
    • Lambert Conic Conformal.
    • Longitude-Latitude.
    • Cartesian.
  • Supported ellipsoids :
    • Airy
    • Australian National
    • Bessel 1841
    • Bessel 1841 N
    • Clarke 1866
    • Clarke 1880
    • Everest
    • Fischer 1960
    • Fischer 1968
    • GRS 1967
    • GRS 1980
    • Helmert 1906
    • Hough
    • International
    • Krassovsky
    • Modify Airy
    • Modify Everest
    • Modify Fischer 1960
    • South American 1969
    • WGS 1960
    • WGS 1966
    • WGS 1972
    • WGS 1984
  • User defined projections*.
  • Save vector files in a new projection.
  • Raster reprojection.
  • Real time raster resolution management.

* Functionality to be added.

3D Surface Rendering:

  • Mouse driven model animation.
  • Lighting parameters.
  • Mouse driven viewer position.
  • Raster maps draping.
  • Vector maps draping.
  • BMP model exporation.

Printing :

  • Printing from the text editor.
  • Complete printer setup capabilities.
  • Map layout :
    • Reference grid.
    • North.
    • Dynamic scale object.
    • Projection.
    • Frame.
    • Legend.
    • Floating text.
    • Floating polygones, polylines and symbols.
    • Floating BMP image .
    • Control over object display order.
    • Scale control.
    • Cartographic layout saving.
    • Cartographic layout restoring.
    • Graphic monitors rotation*.
    • Automatic update of the graphic monitor display changes (content, roaming, zoom, resolution).

* Functionality to be added within a few months.

Text editor:

  • Edit and save.
  • Select, copy, cut, paste.
  • Find and replace.
  • Print.

Online Help:

  • Complete documentation in a standard Windows help file including all application menus and dialog boxes.

Version Limitations:

  • Freeware version:
    • Maximum raster processing of 800 x 800 pixels images.
    • Maximum vector processing of 5 layers each containing 1500 objects.
    • Maximum of 50 training sites for image processing supervised classification.
    • Automatic topological edition not included.
    • No version update or technical support plan available.
  • Professional version :
    • Maximum raster processing of 32767 x 32767 pixels images.
    • Maximum vector processing of 64 layers each containing 2147483647 objects.
    • Maximum of 500 training sites for image processing supervised classification.
    • Technical support plan available on demand at a supplementary cost.

 

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