Spatial Analyst

Pubblicato: Martedì, 20 Maggio 2014 Scritto da Supergeo Italia

SuperGIS Spatial Analyst è uno potente modulo GIS per l'elaborazione dei dati spaziali. Consente la creazione, l'analisi e lìinterrogazione dei dati raster. Gli utenti possono utilizzare questo modulo per analizzare i dati spaziali in differenti modi e con differenti punti di vista.


Spatial Polygon Analysis

  • Distance function is supported, and it contains the following analyses:
  • Straight line analyst: Contains three types of calculation methods, straight distance, allocation and direction.
  • Cost weight analyst: Can generate cost distance chart, cost back link chart and cost allocation chart.
  • Shortest path analyst
  • Corridor analyst
  • Density function is supported, which is performed using either Simple or Kernel.
  • Interpolation is supported, which includes Inverse Distance Weighted (IDW) and trend, allowing users to use the sample point data to estimate the data for a continuous surface.

Surface Analysis

  • Viewshed function is supported, allowing users to analyze by either importing a known point or selecting a point on the map by mouse.
  • Slope analysis is supported, where the display methods include degree, radian and percentage.
  • Aspect analysis is supported.
  • Curve analysis is supported, providing three analysis methods: Normal, Profile and Plan.
  • Isopleth analysis is supported.
  • Cut/Fill analysis is supported.
  • Hillshade analysis is supported, allowing users to set up the azimuth and altitude.
  • Cross Section illustration is supported.


Hydrology Analysis

  • Sink: Identify sinks with flow direction
  • Fill: iteratively fill the sinks based on elevation and flow direction to
  • Flow length: provide Downstream and Upstream methods
  • Flow direction: create eight-direction flow direction modeling by comparing the elevation value of pixels
  • Flow accumulation: to know the locations of surface runoff, river, mountain ridge by analyzing the data of flow direction
  • Stream link: to create stream link info by analyzing flow direction, the intersection of rivers
  • Stream order: calculate with Shreve stream ordering method
  • Basin: analyze pour point location with flow direction and find the range of watershed
  • Snap pour point: to estimate subset by setting pour points and system adjusting
  • Watershed: allows to set the threshlod to define the minimum volume; classify watershed by using flow direction, watershed location, and pond location.


Image Data Statistics and Processing

  • Re-sampling of raster layers is supported. It provides three sampling methods: Nearest Neighbor, Bilinear and Cubic.
  • Ten statistics are provided for Cell Statistics, Zonal Statistics and Neighborhood Statistics: majority, minority, maximum, minimum, average, median, standard deviation, range, sum and variance.
  • When using the Neighborhood Statistics, users can use rectangle, circle, annulus and wedge-shapes to select neighborhood extent.
  • A calculator function is provided, allowing users to compile statistics on the raster data for logical and mathematical calculations.
  • Users can perform image combination using the calculator function to obtain the results of image clipping.
  • Raster to Vector data conversion is supported.
  • Vector to Raster data conversion is supported.
  • Image filter function is provided. It has many functions, including low-frequency filter, high-frequency filter, linear probing, edge enhancement, and so on.
  • Image Reclassify function is supported.
  • Legend settings for raster data are supported.
  • Mask setting for raster data is supported.


Raster Data Toolset

  • Enables users to create raster data from point, polyline, polygon vector layers by four methods: constant, normal, random and text.
  • Conversion of raster data to text files is supported.
  • Various analysts are provided in the Toolset:
  • Distance Analyst
  • Conditional Analyst
  • Extract Analyst
  • Local Analyst
  • Neighborhood Analyst
  • Zonal Analyst
  • Generalize Analyst
  • Math Calculate


Support File Format

  • Vector files in GEO (SuperGeo GEO Format) and Shapefile formats are supported.
  • Raster data in LAN and GeoTiff formats are supported.



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