PostGIS Raster : Extending PostgreSQL for The Support of ... - CoDE

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1.3 Organisation This thesis is organized as follows : Section 2 starts with GIS and its applications. Section 3 describes the goals of PostGIS Raster, along with some comparisons with the existed plugin supporting raster Oracle GeoRaster to give users more motivations. The following section describes in detail PostGIS Raster structure and how this one is stored, indexed, retrieved and overlapped. Section 5 provides guides for users about utilisation of some PostGIS Raster functions. Section 6 extends PostGIS Raster by adding temporal feature and describes a set of operators related to aspect temporal. An implemented application that enhances Quantum Geographic Information System (QGIS) to exploit the temporal feature of the PostGIS Raster data will be shown in the next section. Finally, Section 8 concludes our work and point out to future perspectives. 3
Chapter 2 Geographic Information Systems Geographic data is stored, manipulated, analyzed by a Geographic Information System (GIS). This section describes what is a GIS and different types of geographic data such as raster and vector. Then there are a short introduction to some interesting GIS applications. 2.1 Introduction Geographic data is much more than electronic pictures. The geographic data describes not only real objects and relations in space but contains also spatial reference, geometric and thematic information. Nevertheless, to fully exploit these characteristics, an additional tool is needed. A geographic information system is an information system designed to integrates, stores, edits, analyzes, shares and displays geographic information for decision makers. GIS applications are tools that allow users to create interactive queries, analyze spatial information, edit data in maps and present the results of all these operations. A GIS is the merging of cartography, statistical analysis and database technology. It is customdesigned for an organization. A GIS developed for jurisdiction or enterprise purposes may not be necessarily interoperable or compatible with a GIS that has been developed for some other applications. 2.2 Elements of GIS All GISs that provide rich behaviors for representing and managing geographic information are based on four fundamental elements: • Features • Attributes • Imagery • Surfaces 2.2.1 Features A feature is used to describe an entity in space-time. Besides a number of additional features, common geographic features are collections of points, lines and polygons. They represent discrete things that occur naturally (such as rivers and vegetation) to those of constructions (such as roads, pipelines, wells and buildings) or subdivisions of land (such as counties, political divisions and land parcels). Points Points define discrete things that are too small to be depicted as lines or areas like locations, telephone poles and stream gauges. Points can also represent address locations, Global Positioning System (GPS) coordinates or mountain peaks. 4
Page 1 and 2: Faculté de Sciences Appliquées Se
Page 3 and 4: Abstract Nowadays, in many applicat
Page 5 and 6: 3.2.4 Overlapping Raster and Vector
Page 7 and 8: D.5 Geology, Geophysics and Geochem
Page 9 and 10: 4.9 Raster cell [16]. . . . . . . .
Page 11: Chapter 1 Introduction 1.1 Context
Page 15 and 16: 2.2.3 Imagery Figure 2.3: Polygon f
Page 17 and 18: Figure 2.8: Surface expressed by co
Page 19 and 20: 4-foot logo. The file size is the s
Page 21 and 22: 2.4.2 Data Theme Figure 2.14: Multi
Page 23 and 24: measures of latitude. Longitude mea
Page 25 and 26: 2.6 GIS Applications 2.6.1 Crime Ma
Page 27 and 28: 2.6.3 Traditional Knowledge GIS Tra
Page 29 and 30: These additional functionalities ma
Page 31 and 32: Figure 3.3: Physical storage of Geo
Page 33 and 34: DROP INDEX spain_images_idx; CREATE
Page 35 and 36: In summary, the intersection is muc
Page 37 and 38: Attribute information Table 4.1: Po
Page 39 and 40: Figure 4.2: Information representat
Page 41 and 42: for discrete data while floating-po
Page 43 and 44: the matrix are parallel to the x-ax
Page 45 and 46: Lines Figure 4.15: Raster point rep
Page 47 and 48: Choosing an appropriate cell size i
Page 49 and 50: The multi-band conception is result
Page 51 and 52: "32BUI" = 32-bit unsigned integer "
Page 53 and 54: Figure 4.30: Pyramids at different
Page 55 and 56: ectangular because there might be s
Page 57 and 58: Figure 4.39: Vector to raster conve
Page 59 and 60: Figure 4.42: Web application with o
Page 61 and 62: In this example, the dummy_rast tab
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One approach to make this intersect
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4.19 Intersection The fact that Pos
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Figure 4.51: Raster and raster inte
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ST_Present and ST_Passes predicates
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Chapter 5 User Guide Sometimes stor
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SELECT rast As origin, ST_Resample(
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• gvSIG plugin • MapServer thro
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SELECT ST_AsJPEG(rast) As rastjpg F
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FROM buff_temp GROUP BY id ORDER BY
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Chapter 6 Application Most of GIS a
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6.2 Tools Figure 6.3: PostGIS conne
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Figure 6.6: Band area. controlled b
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Figure 6.10: The loading map parall
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Figure 6.14: Maps representing worl
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Figure 6.17: Maps with a color lege
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their levels of awareness of geogra
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[15] Jorge Arevalo. PostGIS Raster
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Appendix A PostGIS Raster Utilisati
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eturn "Version 0.1" def qgisMinimum
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Appendix C Code Implementation C.1
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name="" # Setting table name and mo
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Figure D.1: Synthetic aperture rada
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D.4 Digital Image Processing D.4.1
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Figure D.4: Age of the sea floor. M
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Appendix F Continuous Surfaces One
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