Python Geospatial Development EssentialsPackt Publishing Ltd, 17/06/2015 - 192 páginas This book provides you with the resources to successfully develop your own GIS application in Python. The book begins by walking you through the loading and saving of data structures before you start to build the look and feel of your application and create its interactive map window. You'll then move on to managing, editing, and analyzing spatial data from within the application and finish with instructions for packaging the application for distribution. By the end of the book, you should be able to use your GIS application as a template for further development, with the potential to expand and customize it to suit your needs. |
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Página 6
... polygons) and raster (a regularly spaced out grid of data points or cells, similar to an image and its pixels). For a more detailed introduction to the differences between vector [6] Preparing to Build Your Own GIS Application Imagining ...
... polygons) and raster (a regularly spaced out grid of data points or cells, similar to an image and its pixels). For a more detailed introduction to the differences between vector [6] Preparing to Build Your Own GIS Application Imagining ...
Página 11
... polygon, line, or point geometries), otherwise it will set the data type based on the geometry type of the first feature that is added. In addition to storing the fieldnames and creating features from. [11] Chapter 2 The vector data ...
... polygon, line, or point geometries), otherwise it will set the data type based on the geometry type of the first feature that is added. In addition to storing the fieldnames and creating features from. [11] Chapter 2 The vector data ...
Página 14
... polygons. For the full specification, go to http://geojson.org/ geojson-spec.html. We make sure to give the Feature ... Polygon": pass else: class Feature: def __init__(self, data, row, geometry, id=None): "geometry must be a geojson ...
... polygons. For the full specification, go to http://geojson.org/ geojson-spec.html. We make sure to give the Feature ... Polygon": pass else: class Feature: def __init__(self, data, row, geometry, id=None): "geometry must be a geojson ...
Página 15
Karim Bahgat. elif "Polygon" in geotype and self._data.type == "Polygon": pass else: raise TypeError("Each feature geometry must be of the same type as the file it is attached to") else: self._data.type = self.geometry["type"].replace ...
Karim Bahgat. elif "Polygon" in geotype and self._data.type == "Polygon": pass else: raise TypeError("Each feature geometry must be of the same type as the file it is attached to") else: self._data.type = self.geometry["type"].replace ...
Página 16
... Polygon": exterior = coords[0] xs, ys = itertools.izip(*exterior) bbox = [min(xs),min(ys),max(xs),max(ys)] elif geotype == "MultiPolygon": xs = [x for poly in coords for x,y in poly[0]] ys = [y for poly in coords for x,y in poly[0]] ...
... Polygon": exterior = coords[0] xs, ys = itertools.izip(*exterior) bbox = [min(xs),min(ys),max(xs),max(ys)] elif geotype == "MultiPolygon": xs = [x for poly in coords for x,y in poly[0]] ys = [y for poly in coords for x,y in poly[0]] ...
Índice
1 | |
9 | |
Designing the Visual Look
of Our Application | 43 |
Rendering Our Geodata | 75 |
Managing and Organizing Geographic Data | 103 |
Analyzing Geographic Data | 131 |
Packaging and Distributing Your Application | 147 |
Looking Forward | 159 |
Index | 167 |
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Palavras e frases frequentes
affine transform anchor="ne bands basic bbox bounding box button cells chapter class a subclass coordinate coords create def __init__(self default define dist folder EXE file expand=True file format filepath following code following screenshot functionality GDAL geographic data geoj GeoJSON geometries geospatial geospatial metadata GeoTIFF GIS application icon implement Inno Setup input inputwidget install interactive kwargs layer LayerGroup layeritem layeritem in layerspane layerspane libraries MapCanvas class Matplotlib menu method module mouse nodata NumPy open source options window Packt pixel polygon popup_message(self py2exe PyAgg pyshp Python Python Package pythongis raster data raw tags rendering resampling resize runtoolframe script selector self.add_info(general self.layerspane self.statusbar shapefile spatial index specified startx starty statusbar style_options_labels Tkinter tool toolbar toolkit tuple user interface vector and raster vector data visual width xscale zonal statistics zoom