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

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Band Properties Figure 6.12: Media area. Depend on the number of bands that a map possesses, the Single band radio button (respectively the Multi band radio button) will be marked if the map has only one band (multi band). Figure 6.13: Single band rasters. In the case of one band, each map is coded in gray color (a pixel color is coded either in RGB or CMYK color models that require at least three band). However, user can load a color palette from a style file created from color legend option. A style file describes each pixel value by a RGB triple in each row. Example of rows in a style file is as follows: "17.00592,139,0,116,255, 17.56223,137,0,118,255, ..." The first number is a pixel value. The next three numbers are a RGB triple. The final number is alpha value that indicates the transparency level between an image and a background. In this example, 255 will create a full transparency. To set up a color palette for a map from a style file, firstly QGIS uses the file to create Color Ramp Entries array object and then set this object for the maps. Pseudo code to set up a color palette: Create Color Ramp Entries array object For each loaded map Tell the map to use a QgsColorRampShader function Get a pointer to the raster shader function Set parameters for the QgsColorRampShader function using Color Ramp Entries array Refresh the map In multi band case, as maps are already coded in either RGB or CMYK color models, then there is no option to create a color table. Instead, it offers the possibility for user to choose a specific single band for visualization or switch to multi band mode. By default, color maps are displayed in multi band color mode. When single band color mode is activated and a band number is chosen, the function mulSinBandCol is used to turn on only the chosen band and turn off the others band for all maps. Pseudocode for mulMulBandCol: For each loaded map Turn the map on MultiBandColor mode. For single band color, pseudocode of mulSinBandCol is: 79
Figure 6.14: Maps representing world climate are loaded as single band rasters. They are turned into color maps by loading a created color palette "worldclim.txt". Figure 6.15: Map is loaded as multi band raster. 80
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Faculté de Sciences Appliquées Se
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Abstract Nowadays, in many applicat
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3.2.4 Overlapping Raster and Vector
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D.5 Geology, Geophysics and Geochem
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4.9 Raster cell [16]. . . . . . . .
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Chapter 1 Introduction 1.1 Context
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Chapter 2 Geographic Information Sy
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2.2.3 Imagery Figure 2.3: Polygon f
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Figure 2.8: Surface expressed by co
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4-foot logo. The file size is the s
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2.4.2 Data Theme Figure 2.14: Multi
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measures of latitude. Longitude mea
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2.6 GIS Applications 2.6.1 Crime Ma
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2.6.3 Traditional Knowledge GIS Tra
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These additional functionalities ma
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Figure 3.3: Physical storage of Geo
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DROP INDEX spain_images_idx; CREATE
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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
Page 63 and 64: One approach to make this intersect
Page 65 and 66: 4.19 Intersection The fact that Pos
Page 67 and 68: Figure 4.51: Raster and raster inte
Page 69 and 70: ST_Present and ST_Passes predicates
Page 71 and 72: Chapter 5 User Guide Sometimes stor
Page 73 and 74: SELECT rast As origin, ST_Resample(
Page 75 and 76: • gvSIG plugin • MapServer thro
Page 77 and 78: SELECT ST_AsJPEG(rast) As rastjpg F
Page 79 and 80: FROM buff_temp GROUP BY id ORDER BY
Page 81 and 82: Chapter 6 Application Most of GIS a
Page 83 and 84: 6.2 Tools Figure 6.3: PostGIS conne
Page 85 and 86: Figure 6.6: Band area. controlled b
Page 87: Figure 6.10: The loading map parall
Page 91 and 92: Figure 6.17: Maps with a color lege
Page 93 and 94: their levels of awareness of geogra
Page 95 and 96: [15] Jorge Arevalo. PostGIS Raster
Page 97 and 98: Appendix A PostGIS Raster Utilisati
Page 99 and 100: eturn "Version 0.1" def qgisMinimum
Page 101 and 102: Appendix C Code Implementation C.1
Page 103 and 104: name="" # Setting table name and mo
Page 105 and 106: Figure D.1: Synthetic aperture rada
Page 107 and 108: D.4 Digital Image Processing D.4.1
Page 109 and 110: Figure D.4: Age of the sea floor. M
Page 111 and 112: Appendix F Continuous Surfaces One
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