Module: safe.storage.core
IO module for reading and writing of files
This module provides functionality to read and write
raster and vector layers from numerical data.
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safe.storage.core.bboxlist2string(bbox, decimals=6)[source]
Convert bounding box list to comma separated string
- Args:
- bbox: List of coordinates of the form [W, S, E, N]
- Returns:
- bbox_string: Format ‘W,S,E,N’ - each will have 6 decimal points
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safe.storage.core.bboxstring2list(bbox_string)[source]
Convert bounding box string to list
- Args:
- bbox_string: String of bounding box coordinates of the form ‘W,S,E,N’
- Returns:
- bbox: List of floating point numbers with format [W, S, E, N]
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safe.storage.core.check_bbox_string(bbox_string)[source]
Check that bbox string is valid
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safe.storage.core.get_bounding_box(filename)[source]
Get bounding box for specified raster or vector file
- Args:
-
- Returns:
- bounding box as python list of numbers [West, South, East, North]
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safe.storage.core.get_bounding_box_string(filename)[source]
Get bounding box for specified raster or vector file
- Args:
-
- Returns:
- bounding box as python string ‘West, South, East, North’
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safe.storage.core.read_layer(filename)[source]
Read spatial layer from file.
This can be either raster or vector data.
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safe.storage.core.write_raster_data(data, projection, geotransform, filename, keywords=None)[source]
Write array to raster file with specified metadata and one data layer
- Args:
data: Numpy array containing grid data
projection: WKT projection information
- geotransform: 6 digit vector
- (top left x, w-e pixel resolution, rotation,
top left y, rotation, n-s pixel resolution).
See e.g. http://www.gdal.org/gdal_tutorial.html
filename: Output filename
keywords: Optional dictionary
- Note:
- The only format implemented is GTiff and the extension must be .tif
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safe.storage.core.write_vector_data(data, projection, geometry, filename, keywords=None)[source]
Write point data and any associated attributes to vector file
- Args:
- data: List of N dictionaries each with M fields where
M is the number of attributes.
A value of None is acceptable.
projection: WKT projection information
geometry: List of points or polygons.
filename: Output filename
keywords: Optional dictionary
- Note
- The only format implemented is GML and SHP so the extension
must be either .gml or .shp
# FIXME (Ole): When the GML driver is used,
# the spatial reference is not stored.
# I suspect this is a bug in OGR.
- Background:
-
This module forms part of the InaSAFE tool.