'Raster model' diaporamas de présentation

Spatial analysis in GIS

Spatial analysis in GIS. GIS for mineral and hydrocarbon exploration. Used for integrating data (map layers) to identify most prospective areas. ?. Integrating function linear or non-linear parameters. Output mineral potential map Grey-scale or binary. Input spatial datasets

1.76k views • 70 slides

Output Concepts

Output Concepts. Start with some basics: display devices. Just how do we get images onto a screen? Most prevalent device: CRT Cathode Ray Tube AKA TV tube. Cathode Ray Tubes. Cutting edge 1930’s technology (basic device actually 100 yrs old) Vacuum tube (big, power hog, …)

774 views • 62 slides

Data Models

Data Models. There are 3 parts to a GIS: GUI Tools Data Management System May be distributed on separate machines connected by a network We will look today at the different ways in which the data are stored within a GIS. Levels Of Abstraction. Can identify four levels of abstraction:

570 views • 32 slides

Pablo Sastre Olmos

Pablo Sastre Olmos. Introduction to Geographic Information Systems (GIS). 7 May 2008. Geographic Information Systems. Mapping criteria must be relevant for the organisms or processes studied. 1:18.000. 1:6.500. 1 km. 1 km. 1 km. Analysis at different resolution scales. Mapa 1:50.000.

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318 views • 19 slides

Spatial Databases - Representation

Spatial Databases - Representation. Spring, 2008 Ki-Joune Li. Spatial Databases. Entity-Based Databases vs. Field-Based Databases Entity-Based Databases Set of Spatial Objects Non-Spatial Attributes for each object Field-Based Databases No clear boundary of an object

310 views • 17 slides

Spatial Databases - Quiz

Spatial Databases - Quiz. Spring, 2007 Ki-Joune Li. Quiz-Quadtree. For a quatree T and a polygon P , p is the perimeter (in pixel width) of P , and T has 2 n x2 n pixels. Then What is the least upper bound on the number of nodes in T ? Describe it in big-O notation.

356 views • 17 slides

Spatial Databases - Representation

Spatial Databases - Representation. Spring, 2017 Ki-Joune Li. Spatial Databases. Entity-Based Databases vs. Field-Based Databases Entity-Based Databases Set of Spatial Objects Non-Spatial Attributes for each object Field-Based Databases No clear boundary of an object

175 views • 17 slides

Methods of representing geographic space

Methods of representing geographic space. Raster Model Vector Model. Map as an Abstraction of space:. Spatial features can be represented as points, lines and area(polygons).

208 views • 13 slides