A short overview of the functions in Explostat;
- Database (all data are in ascii format and export/import with many GIS systems is possible)
- 30 grid layers
- Five line layers
- One main point layer and 8 point layers for designing sample schemas.
- Drill core descriptions
- Results of chemical analysis
Basic Display Functions
- Grid layers, color palettes, set range of attribute values.
- Vector layers, width of lines, color of lines.
- Points, size and color
Example
Advanced Display Functions
- Histogram
- Scatter plot
- profiles of one to 30 grid layers in the same diagram
(default North-South and West-East or user defined by digitising path)
- Drill cores as bar diagrams (multiple if locations are close
together)
- Soil samples as bar diagram plotted at the same scale as the drill
core bars
- Directions and soil sample bars are shown in the profiles, so it is
possible to compare the position of individual drills with respect to grid layers.
Example
Example
Linking objects on the map
- Bars in the histogram are linked with the point data on the map,
selecting and deselecting of data is possible.
- Bars in the histogram are link with the variogram, after selecting or
deselecting the variogram can be recalculated.
- Linking all points pairs belonging to a lag in the variogram to lines
between the locations on the map. Thresholds of the semi variance can be set with the
mouse.
- Selecting an area object on the map selects all points within the
object. In this way a link from geographical objects to the histogram an variogram is
possible.
- Selecting or deselecting individual points.
- Selecting points in the scatter gram.
Example
Example
Digitising
- Five layers can be digitised and also edited. Line objects that are close by a double-click with the mouse can be deleted or elected for export.
Inside a map object (only for the vector layer mask). Several spatial
analysis can de applied on the selected spatial objects.
- Points (sample design)
Query
- Values of all grid layers at the clicking location
- Diagnose mode: all points that were used for interpolation in the clicking location.
- attribute values of line and point objects
Spatial analysis (main functions)
- Ordinary Point/Co-Kriging, and Irrigular Block kriging
- Sequential Gaussian Simulation
- Voronoi interpolation (used for visualisation of spatial variation)
- Inverse Distance Weighting
- Calculating volumes from grid layers and an user defined area.
- Calculating experimental variogram
- Fitting Variogram (Spherical, Gaussian, Linear, Linear with Sill,Exponential,Bessel, Circular, Hole Effect)
- Generation of surfaces
- Generations of slopes with user defined offset and slope.
- Several types of raster overlay operations.
- Optimzing Sample Schemes by minimizing Block Kriging Variance.
Statistical analysis
- Principal Components
- Correspondence Factors
- Binomial Test
- Fisher Test