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2. Wikipedia : Graphics Lab/Resources/QGIS/Get ready

   en.wikipedia.org/.../Resources/QGIS/Get_ready

   Using QGis will be mainly helpful in generating topographic backgrounds (png, svg), shaded reliefs (png), and administrative regions or borders (png, svg), and applying various styles to them. While GRASS GIS still seems to be the most common GIS software, it has a primarily command-line interface and can be difficult to learn and operate.

3. Voronoi diagram - Wikipedia

   en.wikipedia.org/wiki/Voronoi_diagram

   Under relatively general conditions (the space is a possibly infinite-dimensional uniformly convex space, there can be infinitely many sites of a general form, etc.) Voronoi cells enjoy a certain stability property: a small change in the shapes of the sites, e.g., a change caused by some translation or distortion, yields a small change in the ...

4. QGIS - Wikipedia

   en.wikipedia.org/wiki/QGIS

   QGIS is a geographic information system (GIS) software that is free and open-source. [2] QGIS supports Windows, macOS, and Linux. [3] It supports viewing, editing, printing, and analysis of geospatial data in a range of data formats. Its name comes from an abbreviation of its previous name, Quantum GIS.

5. Data model (GIS) - Wikipedia

   en.wikipedia.org/wiki/Data_model_(GIS)

   Height fields (also known as "2 1/2 dimensional surfaces") model three-dimensional phenomena by a single functional surface, in which elevation is a function of two-dimensional location, allowing it to be represented using field techniques such as isolated points, contour lines, raster (the digital elevation model), and triangulated irregular ...

6. List of two-dimensional geometric shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_two-dimensional...

   This is a list of two-dimensional geometric shapes in Euclidean and other geometries. For mathematical objects in more dimensions, see list of mathematical shapes. For a broader scope, see list of shapes.

7. Wikipedia : Graphic Lab/Resources/Wikimaps atlas/Lesson 1

   en.wikipedia.org/wiki/Wikipedia:Graphic_Lab/...

   Action: When run, this topography.makefile download the raster GIS DEM sources, process them (unzip, crop, slice, polygonize, merge), to output an elegant topographic stack topojson or svg file. topography.makefile

8. Finite volume method for two dimensional diffusion problem

   en.wikipedia.org/wiki/Finite_volume_method_for...

   A portion of the two dimensional grid used for Discretization is shown below: Graph of 2 dimensional plot. In addition to the east (E) and west (W) neighbors, a general grid node P, now also has north (N) and south (S) neighbors. The same notation is used here for all faces and cell dimensions as in one dimensional analysis.

9. List of polygons, polyhedra and polytopes - Wikipedia

   en.wikipedia.org/wiki/List_of_polygons...

   2 Two dimensional (polygons) Toggle Two dimensional (polygons) subsection. 2.1 Star polygons. 2.2 Families. ... Vertex figure; Peak – (n−3)-face; Ridge – (n−2 ...