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

More documents

Recommendations

Info

if hasattr(self.iface, "addPluginToRasterMenu"): # Remove action from Raster toolbar and menu self.iface.removePluginRasterMenu("\&Test plugins",self.action) self.iface.removeRasterToolBarIcon(self.action) else: # Remove the Plugin menu and toolbar self.iface.removePluginMenu("\&Test plugins",self.action) self.iface.removeToolBarIcon(self.action)\\ def run(self): # Main code for all the actions describing the plugin print "TestPlugin: run called!" The functions that must exist are initGui() and unload(). These functions are called when the plugin is loaded and unloaded. B.2.3 Resources.qrc In initGui(), an icon icon.png from resource file resources.qrc is used. The structure of this file is as follows: icon.png The pyrcc4 command will generate a Python file that will contain the resources: pyrcc4 -o resources.py resources.qrc 91
Appendix C Code Implementation C.1 Temporal Raster Functions PostgreSQL allows also abilities for users to define new types and their own functions. Then CREATE AGGREGATE can be used to provide the desired features that are not provided by PostgreSQL. An aggregate function is identified by its name and input data type. An aggregate function is made from one or two ordinary functions: a state transition function sfunc and an optional final calculation function ffunc. An temporary variable of type stype is used to hold the current value of the state transition function. At each input data item, the state transition function is invoked to calculate a new state value. After all the data has been processed, the final function is invoked once to calculate the aggregate result. If there is no final function then the aggregate returns the current state value as final result. sum is an example of this kind of aggregate, where for each input, sum adds its value to current state value and returns the sum of all input value as final result. A final function is specified in the case where the final result is different from the input data type. Average aggregate function is an example of this case and will be examined thereafter. If the final function is declared "strict", then it will not be called when the current state value is null. Instead a null result will be returned automatically. Example of creating the aggregate function ST_Avg: CREATE AGGREGATE ST_Avg(st_rastertemp) ( SFUNC=array_append, STYPE=st_rastertemp[], FINALFUNC=ST_AvgTempRaster ); CREATE OR REPLACE FUNCTION ST_AvgTempRaster(arrayRastTemp st_rastertemp[]) RETURNS raster AS $$ DECLARE newraster raster; oldRast1 raster; oldRast2 raster; width int; height int; cx int; cy int; size int; s int; value double precision = 0; intType boolean = true; 92
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 and 12:
Chapter 1 Introduction 1.1 Context
Page 13 and 14:
Chapter 2 Geographic Information Sy
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
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 and 88: Figure 6.10: The loading map parall
Page 89 and 90: Figure 6.14: Maps representing worl
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: eturn "Version 0.1" def qgisMinimum
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
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?