glaes.core.WeightedCriterionCalculator¶
glaes.core.WeightedCriterionCalculator
¶
PriorSource
¶
Bases: object
The PriorSource object loads one of the Prior datasets and makes it accessible for use in general purpose geospatial analyses
Source code in glaes/core/priors.py
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__init__
¶
Initialize a PriorSource object by passing it a path on disk
Source code in glaes/core/priors.py
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containsValue
¶
Checks if a given value is withing the known values in the Prior source
- If 'verbose' is true, a warning is issued when the given value is outside of the Prior's known edge values
Source code in glaes/core/priors.py
valueOnEdge
¶
Checks is a given value is exactly on one of the precomputed edge values
- If 'verbose' is true, a warning is issued when the given value is more than 5% deviant from the closest precomputed edge
Source code in glaes/core/priors.py
generateRaster
¶
Generates a raster datasource around the indicated extent
Parameters:¶
extent: geokit.Extent or tuple Describes the geographic boundaries around which to create the new raster dataset * Using an Extent object is the most robust method * If a tuple is given, (lonMin, latMin, lonMax, latMax) is expected - In this case, an Extent object is created immediately and cast to the Prior's srs (EPSG3035) * In truth, anything acceptable to geokit.Extent.load() could be given as an input here
untouched: str; optional Determines how to treat values outside of the Prior's edge list * If 'tight', pixels which are untouched are given a value slightly beyond than the final edge * If 'wide', they are given a value far away from the final edge
**kwargs: All keyword arguments are passed along to geokit.raster.mutateRaster
Returns:¶
gdal.Dataset
Source code in glaes/core/priors.py
generateVector
¶
Generates a vector datasource around the indicated extent and at an approximation at the indicated value
- If a value is given that corresponds to one of the pre-calculated edges, the Prior source is 'polygonized' exactly at that edge
- If a value is given which falls between two edges, the closest edge is polygonized and the resulting geometry is shrunk or grown to make up the difference
- Be careful, this is a costly procedure!
Note:¶
This procedure really only makes sense for the Priors which represent the distance from something, such as 'roads proximity'. It isn't very meaningful to use this for a quantity-based prior, such as "terrain slope"
Parameters:¶
extent: geokit.Extent or tuple Describes the geographic boundaries around which to create the new raster dataset * Using an Extent object is the most robust method * If a tuple is given, (lonMin, latMin, lonMax, latMax) is expected - In this case, an Extent object is created immediately and cast to the Prior's srs (EPSG3035) * In truth, anything acceptable to geokit.Extent.load() could be given as an input here
value: numeric The edge to attempt to reconstruct
output: str; optional A place to put the output if its not needed in memory
Returns:¶
gdal.Dataset
Source code in glaes/core/priors.py
ExclusionCalculator
¶
Bases: object
The ExclusionCalculator object makes land eligibility (LE) analyses easy and quick. Once initialized to a particular region, the ExclusionCalculator object can be used to incorporate any geospatial dataset (so long as it is interpretable by GDAL) into the LE analysis.
Note:¶
By default, ExclusionCalculator is always initialized at 100x100 meter resolution in the EPSG3035 projection system. This is well-suited to LE analyses in Europe, however if another region is being investigated or else if another resolution or projection system is desired for any other reason, this can be incorporated as well during the initialization stage.
If you need to find a new projection system for your analyses, the following website is helpful: http://spatialreference.org/ref/epsg/
Initialization:¶
-
ExclusionCalculator can be initialized by passing a specific vector file describing the investigation region:
ec = ExclusionCalculator(
) -
A particular srs and resolution can be used:
ec = ExclusionCalculator(
, pixelRes=0.001, srs='latlon') -
In fact, the ExclusionCalculator initialization is simply a call to geokit.RegionMask.load, so see that for more information. This also means that any geokit.RegoinMask object can be used to initialize the ExclusionCalculator
rm = geokit.RegionMask.load(
, pad=..., srs=..., pixelRes=..., ...) ec = ExclusionCalculator(rm)
Usage:¶
-
The ExclusionCalculator object contains a member name "availability", which contains the most up to date result of the LE analysis
- Just after initialization, the the availability matrix is filled with 100's, meaning that all locations are available
- After excluding locations based off various geospatial datasets, cells in the availability matrix are changed to a value between 0 and 100, where 0 means completely unavailable, 100 means fully available, and intermediate values indicate a pixel which is only partly excluded.
-
Exclusions can be applied by using one of the 'excludeVectorType', 'excludeRasterType', or 'excludePrior' methods
- The correct method to use depends on the format of the datasource used for exclusions
- After all exclusions have been applied...
- The 'draw' method can be used to visualize the result
- The 'save' method will save the result to a raster file on disc
- The 'availability' member can be used to extract the availability matrix as a NumPy matrix for further usage
Source code in glaes/core/ExclusionCalculator.py
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availability
property
¶
A matrix containing the availability of each location after all applied exclusions. * A value of 100 is interpreted as fully available * A value of 0 is interpreted as completely excluded * In between values are...in between
percentAvailablePerCriterion
property
¶
The percent of the region which remains available only for the respective last criteria excluded since the last call to clearPercentAvailablePerCriterion(), or the setup of the ExclusionCalculator instance.
percentAvailableAreaGeometries
property
¶
The percent of the region covered with area geometries relative to the total region area in percent. May be reduced compared to the value of percentAvailable by e.g. pruneIsolatedAreas()
clearPercentAvailablePerCriterion
property
¶
Reset the _availability_per_criterion attribute to full eligibility to assess only the exclusions caused by the following set of criteria
areaAvailable
property
¶
The area of the region which remains available * Units are defined by the srs used to initialize the ExclusionCalculator
regionArea
property
¶
The total area of the region * Units are defined by the srs used to initialize the ExclusionCalculator
__init__
¶
__init__(s, region, start_raster=None, srs='LAEA', pixelRes=100, where=None, padExtent=0, initialValue=True, verbose=True, **kwargs)
Initialize the ExclusionCalculator
Parameters:¶
region : str, ogr.Geometry, geokit.RegionMask The regional definition for the land eligibility analysis * If given as a string, must be a path to a vector file. - NOTE: Either the vector file should contain exactly 1 feature, a "where" statement should be used to select a specific feature, or "limitOne=False" should be specified (to join all features) * If given as a RegionMask, it is taken directly despite other arguments
srs : str, Anything acceptable to geokit.srs.loadSRS()
The srs context in which the RegionMask object will be generated.
* If an integer is given, it is treated as an EPSG identifier. Look
here for options: http://spatialreference.org/ref/epsg/
* Can also be passed as a str in an "EPSG:
pixelRes : float or tuple The generated RegionMask's native pixel size(s) * If float : A pixel size to apply to both the X and Y dimension * If (float float) : An X-dimension and Y-dimension pixel size * Only effective if 'region' is a path to a vector
where : str, int; optional If string -> An SQL-like where statement to apply to the source If int -> The feature's ID within the vector dataset * Feature attribute name do not need quotes * String values should be wrapped in 'single quotes' * Only effective if 'region' is a path to a vector Example: If the source vector has a string attribute called "ISO" and a integer attribute called "POP", you could use....
where = "ISO='DEU' AND POP>1000"
padExtent : float; optional An amount by which to pad the extent before generating the RegionMask * Only effective if 'region' is a path to a vector
initialValue : bool or str; optional Used to control the initial state of the ExclusionCalculator * If "True", the region is assumed to begin as fully available * If "False", the region is assumed to begin as completely unavailable * If a path to a ".tif" file is given, then the ExclusionCalculator is initialized by warping (using the 'near' algorithm) from the given raster, and excluding pixels with a value of 0
kwargs: * Keyword arguments are passed on to a call to geokit.RegionMask.load * Only take effect when the 'region' argument is a string
Source code in glaes/core/ExclusionCalculator.py
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save
¶
Save the current availability matrix to a raster file
Output will be a byte-valued raster with the following convention: 0 -> unavailable 1..99 -> Semi-available 100 -> fully eligibile 255 -> "no data" (out of region)
Parameters:¶
output : str The path of the output raster file * Must end in ".tif"
threshold : float; optional The acceptable threshold indicating an available pixel * Use this to process the availability matrix before saving it (will save a little bit of space)
kwargs: * All keyword arguments are passed on to a call to geokit.RegionMask.createRaster * Most notably: - 'dtype' is used to define the data type of the resulting raster - 'overwrite' is used to force overwrite an existing file
Source code in glaes/core/ExclusionCalculator.py
draw
¶
draw(s, ax=None, goodColor=(255 / 255, 255 / 255, 255 / 255), excludedColor=(2 / 255, 61 / 255, 107 / 255), itemsColor=(51 / 255, 153 / 255, 255 / 255), legend=True, legendargs={'loc': 'lower left'}, srs=None, dataScalingFactor=1, geomSimplificationFactor=None, german=False, additionalPoints=True, **kwargs)
Draw the current availability matrix on a matplotlib figure
Note:¶
To save the result somewhere, call 'plt.savefig(...)' immediately calling this function. To directly view the result, call 'plt.show()'
Parameters:¶
ax: matplotlib axis object; optional The axis to draw the figure onto * If given as 'None', then a fresh axis will be produced and displayed or saved immediately
goodColor: A matplotlib color The color to apply to 'good' locations (having a value of 100)
excludedColor: A matplotlib color The color to apply to 'excluded' locations (having a value of 0)
itemsColor: A matplotlib color The color to apply to predicted items. Default is black.
legend: bool; optional If True, a legend will be drawn
legendargs: dict; optional Arguments to pass to the drawn legend (via axes.legend(...))
dataScalingFactor: int; optional A down scaling factor to apply to the visualized availability matrix * Use this when visualizing a large areas * seting this to 1 will apply no scaling
geomSimplificationFactor: int A down scaling factor to apply when drawing the geometry borders of the ExclusionCalculator's region * Use this when the region's geometry is extremely detailed compared to the scale over which it is drawn * Setting this to None will apply no simplification
german: bool If true legend will be in German
additionalPoints: bool or dict If True the internal additional points of the ec are plotted (can be set to False if not wanted). Else a dictionary with the legend naming as the key, the points and the color can be passed: {"Name": {"points": point_items, "color": "red"}} point_items can be a path to shape or an array with coords. Default colors are given if not passed in the dict
**kwargs: All keyword arguments are passed on to a call to geokit.drawImage
Returns:¶
matplotlib axes object
Source code in glaes/core/ExclusionCalculator.py
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drawWithSmopyBasemap
¶
drawWithSmopyBasemap(s, zoom=4, excludedColor=(2 / 255, 61 / 255, 107 / 255, 128 / 255), ax=None, figsize=None, smopy_kwargs=dict(attribution='© OpenStreetMap contributors', attribution_size=12), **kwargs)
This wrapper around the original ExclusionCalculator.draw function adds a basemap bethind the drawn eligibility map
NOTE: * The basemap is drawn using the Smopy python package. See here: https://github.com/rossant/smopy * Be careful to adhere to the usage guidelines of the chosen tile source - By default, this source is OSM. See here: https://wiki.openstreetmap.org/wiki/Tile_servers
!IMPORTANT! If you will publish any images drawn with this method, it's likely that the tile source will require an attribution to be written on the image. For example, if using OSM tile (the default), you have to write "© OpenStreetMap contributors" clearly on the map. But this is different for each tile source!
Tip: * Start with a low zoom value (e.g. 4) and zoom in until you find something reasonable
Parameters:¶
zoom : int
The desired zoom level of the basemap
* Should be between 1 - 20
* The higher the number, the more you're zooming in
* Note that, for each increase in the zoom level, the numer of tiles
fetched increases by a factor of 4
excludeColor : (r, g, b, a)
The color to give to excluded points
ax : matplotlib axes
The axes to draw on
* If not given, one will be generated
figsize : (width, height)
The size of the figure to draw
* Is only effective when ax=None
smopy_kwargs : dict
* Keyword arguments to pass on to gk.raster.drawSmopyMap
kwargs
* All other keyword arguments are passed on to ExclusionCalcularot.draw
Returns:¶
matplotlib axes
Source code in glaes/core/ExclusionCalculator.py
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excludeRasterType
¶
excludeRasterType(s, source, value=None, buffer=None, resolutionDiv=1, intermediate=None, prewarp=False, invert=False, mode='exclude', minSize=None, threshold=50, default=False, multiProcess=False, **kwargs)
Exclude areas based off the values in a raster datasource
Parameters:¶
source : str or gdal.Dataset The raster datasource defining the criteria values for each location
value : numeric, tuple, iterable, or str The exact value, or value range to exclude * If Numeric, should be The exact value to exclude * Generally this should only be done when the raster datasource contains integer values, otherwise a range of values should be used to avoid float comparison errors * If ( Numeric, Numeric ), the low and high boundary describing the range of values to exclude * If either boundary is given as None, then it is interpreted as unlimited * If any other iterable : The list of exact values to accept * If str : The formatted set of elements to accept - Each element in the set is seperated by a "," - Each element must be either a singular numeric value, or a range - A range element begins with either "[" or "(", and ends with either "]" or ")" and should have an '-' in between - "[" and "]" imply inclusivity - "(" and ")" imply exclusivity - Numbers on either side can be omitted, implying no limit on that side - Examples: - "[1-5]" -> Indicate values from 1 up to 5, inclusively - "[1-5)" -> Indicate values from 1 up to 5, but not including 5 - "(1-]" -> Indicate values above 1 (but not including 1) up to infinity - "[-5]" -> Indicate values from negative infinity up to and including 5 - "[-]" -> Indicate values from negative infinity to positive infinity (dont do this..) - All whitespaces will be ignored (so feel free to use them as you wish) - Example: - "[-2),[5-7),12,(22-26],29,33,[40-]" will indicate all of the following: - Everything below 2, but not including 2 - Values between 5 up to 7, but not including 7 - 12 - Values above 22 up to and including 26 - 29 - 33 - Everything above 40, including 40
buffer : float; optional A buffer region to add around the indicated pixels * Units are in the RegionMask's srs * The buffering occurs AFTER the indication and warping step and so it may not represent the original dataset exactly - Buffering can be made more accurate by increasing the 'resolutionDiv' input
resolutionDiv : int; optional The factor by which to divide the RegionMask's native resolution * This is useful if you need to represent very fine details
intermediate : path, optional Path to an intermediate result raster file for this set of function arguments. When not None, the ExclusionCalculator will check if data from the intermediate input file can be used to cache the exclusion calculation result of this criterion. * If path to intermediate file exists, metadata (buffer, resolution, prewarp, invert, mode, kwargs will be compared to current arguments) * If metadata matches, intermediate file will be excluded instead of new calculation * If metadata does not match, exclusion will be calculated anew from source file and new intermediate file with resulting exclusion area is generated at this path. When None, the exclusion will be calculated anew for the given values in any case.
prewarp : bool or str or dict; optional When given, the source will be warped to the calculator's mask context before processing * If True, warping will be performed using the bilinear scheme * If str, warp using the indicated resampleAlgorithm - options: 'near', 'bilinear', 'cubic', 'average' * If dict, a dictionary of arguments is expected - These are passed along to geokit.RegionMask.warp
invert: bool; optional If True, flip indications
mode: string; optional * If 'exclude', then the indicated pixels are subtracted from the current availability matrix * If 'include', then the indicated pixel are added back into the availability matrix
minSize: int>0; optional Must be given in the unit of the exclusion calculator object. When given, all isolated eligible areas with an area less than minSize will be removed for the current exclusion step (similar to pruneIsolatedAreas() for overall eligibility matrix). Note: Takes very long for large regions with low exclusion.
threshold: int (>0, <100); optional Cells with an eligibility percentage below this threshold will be considered as ineligible. Defaults to 50.
default: bool; optional If True, no source must be passed and am empty, fully eligible default intermediate file (or 0% if mode=include) will be returned. If a string is passed as source, it will be written into the sourcePath as well as the _exclusionStr instead of the actual source. Defaults to False.
kwargs * All other keyword arguments are passed on to a call to geokit.RegionMask.indicateValues
Source code in glaes/core/ExclusionCalculator.py
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excludeVectorType
¶
excludeVectorType(s, source, where=None, buffer=None, bufferMethod='geom', invert=False, mode='exclude', resolutionDiv=1, intermediate=None, regionPad=None, useRegionmask=True, default=False, multiProcess: bool = False, **kwargs)
Exclude areas based off the features in a vector datasource
Parameters:¶
source : str or gdal.Dataset The raster datasource defining the criteria values for each location
where : str A filtering statement to apply to the datasource before the indication * This is an SQL like statement which can operate on features in the datasource * For tips, see "http://www.gdal.org/ogr_sql.html" * For example... - If the datasource had features which each have an attribute called 'type' and only features with the type "protected" are wanted, the correct statement would be: where="type='protected'"
buffer : float; optional A buffer region to add around the indicated pixels * Units are in the RegionMask's srs
bufferMethod : str; optional An indicator determining the method to use when buffereing * Options are: 'geom' and 'area' * If 'geom', the function will attempt to grow each of the geometries directly using the ogr library - This can fail sometimes when the geometries are particularly complex or if some of the geometries are not valid (as in, they have self-intersections) * If 'area', the function will first rasterize the raw geometries and will then apply the buffer to the indicated pixels - This is the safer option although is not as accurate as the 'geom' option since it does not capture the exact edges of the geometries - This method can be made more accurate by increasing the 'resolutionDiv' input
resolutionDiv : int; optional The factor by which to divide the RegionMask's native resolution * This is useful if you need to represent very fine details
intermediate : path, optional Path to the intermediate results tif file for this set of function arguments. When not None, the exclusioncalculator will check if data from intermediate input files can be used to save calculation of this particular exclusion criterion. * If path to intermediate file exists, metadata (buffer, resolution, prewarp, invert, mode, kwargs will be compared to current arguments) * If metadata matches, intermediate file will be excluded instead of new calculation * If metadata does not match, exclusion will be calculated anew from source file and new intermediate file with resulting exclusion area is generated at this path. When None, the exclusion will be calculated anew for the given values in any case.
invert: bool; optional If True, flip indications
mode: string; optional * If 'exclude', then the indicated pixels are subtracted from the current availability matrix * If 'include', then the indicated pixel are added back into the availability matrix
regionPad: int; optional * If given feature within a buffer of regionPad will be considered for exclusion. Default (None) sets regionPad=buffer
useRegionmask: bool; optional * If True, vector dataset will be pre-loaded via regionmask to save time loading huge vector datasets. Defaults to True
default: bool; optional If True, no source must be passed and am empty, fully eligible default intermediate file (or 0% if mode=include) will be returned. If a string is passed as source, it will be written into the sourcePath as well as the _exclusionStr instead of the actual source. Defaults to False.
kwargs * All other keyword arguments are passed on to a call to geokit.RegionMask.indicateFeatures
Source code in glaes/core/ExclusionCalculator.py
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excludePoints
¶
Exclude points with different buffer shapes.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
source
|
str or Dataset or DataFrame
|
The datasource with point geometries |
required |
geometryShape
|
str
|
choose "rectangle" or "ellipse" |
required |
scale
|
tuple
|
size of the buffer geometry, by default None |
None
|
where
|
str
|
where-statement can only be applied if source is gdal.DataSet or str. A filtering statement to apply to the datasource before the indication * This is an SQL like statement which can operate on features in the datasource * For tips, see "http://www.gdal.org/ogr_sql.html" * For example... - If the datasource had features which each have an attribute called 'type' and only features with the type "protected" are wanted, the correct statement would be: where="type='protected'", by default None |
None
|
direction
|
int
|
orientation of the buffer geometry in degrees, by default None |
None
|
saveToEC
|
str
|
name for points in ec plot, by default None. The points are only saved if a string is passed. |
None
|
Source code in glaes/core/ExclusionCalculator.py
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excludePrior
¶
Exclude areas based off the values in one of the Prior data sources
- The Prior datasources are currently only defined over Europe
- All Prior datasources are defined in the EPSG3035 projection system with 100x100 meter resolution
- For each call to excludePrior, a temporary raster datasource is generated around the ExclusionCalculator's region, after which a call to ExclusionCalculator.excludeRasterType is made, therefore all the same inputs apply here as well
Parameters:¶
source : str or gdal.Dataset The raster datasource defining the criteria values for each location
value : tuple or numeric The exact value, or value range to exclude * If Numeric, should be The exact value to exclude * Generally this should only be done when the raster datasource contains integer values, otherwise a range of values should be used to avoid float comparison errors * If ( Numeric, Numeric ), the low and high boundary describing the range of values to exclude * If either boundary is given as None, then it is interpreted as unlimited
buffer : float; optional A buffer region to add around the indicated pixels * Units are in the RegionMask's srs * The buffering occurs AFTER the indication and warping step and so it may not represent the original dataset exactly - Buffering can be made more accurate by increasing the 'resolutionDiv' input
invert: bool; optional If True, flip indications
mode: string; optional * If 'exclude', then the indicated pixels are subtracted from the current availability matrix * If 'include', then the indicated pixel are added back into the availability matrix
kwargs * All other keyword arguments are passed on to a call to geokit.RegionMask.indicateValues
Source code in glaes/core/ExclusionCalculator.py
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excludeRegionEdge
¶
Exclude some distance from the region's edge
Parameters:¶
buffer : float A buffer region to add around the indicated pixels * Units are in the RegionMask's srs
Source code in glaes/core/ExclusionCalculator.py
excludeSet
¶
Iteratively exclude a set of exclusion constraints
Parameters:¶
exclusion_set : pandas.DataFrame
The rows of this dataframe dictate the exclusions which are performed
in the given order
* The following columns names are used:
- 'name' -> The name of the contraint
- 'type' -> The type of the contraint ['prior', 'raster', or 'vector']
- 'value' -> The vale/where-statement to use
- 'buffer'-> The buffer value (if not given, 0 is assumed)
- 'mode' -> The mode (if not given, 'exclude' is assumed)
- 'invert'-> The inversion state (if not given, False is assumed)
* For raster or prior types, 'value' can be given in several ways:
- "XXX" -> translates to value=XXX. i.e. "exclude exactly XXX"
- "XXX-YYY" -> translates to value=(XXX,YYY). i.e. "exclude between XXX and YYY"
- "None-XXX" -> translates to value=(None,XXX). i.e. "everything below XXX"
- "-XXX" -> also translates to value=(None,XXX)
- "XXX-None" -> translates to value=(XXX, None). i.e. "everything above XXX"
- "XXX-" -> also translates to value=(XXX, None)
* For raster types, see the note in ExclusionCalculator.excludeRasterType regarding
passing string-type value inputs
- For example, "[-2),[5-7),12,(22-26],29,33,[40-]" will indicate pixels with values:
- Below 2, but not including 2
- Between 5 up to 7, but not including 7
- Equal to 12
- Above 22 up to and including 26
- Equal to 29
- Equal to 33
- Above 40, including 40
* For vector types, the 'value' is just the SQL-like where statement
filterSourceLists : bool
If True, then paths to lists of vector files or raster files will be filtered
using self.region.Extent.filterSources(...)
filterMissingError : bool
If True, then if a path is given which does not exist, a RuntimError is raised. Otherwise
a user warning is given.
Only effective when `filterSourceLists` is True
verbose : bool
If True, progress statements are given
**paths
All extra arguments should correspond to the paths on disk for each of the
'name's specified in the exclusion_set input
Source code in glaes/core/ExclusionCalculator.py
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shrinkAvailability
¶
Shrinks the current availability by a given distance in the given SRS
Source code in glaes/core/ExclusionCalculator.py
pruneIsolatedAreas
¶
Removes contiguous areas which are smaller than 'minSize'
- minSize is given in units of the calculator's srs
Source code in glaes/core/ExclusionCalculator.py
distributeItems
¶
distributeItems(s, separation, pixelDivision=5, threshold=50, maxItems=10000000, outputSRS=None, output=None, asArea=False, minArea=100000, maxAcceptableDistance=None, axialDirection=None, sepScaling=None, _voronoiBoundaryPoints=10, _voronoiBoundaryPadding=5, _stamping=True, avoidRegionBorders=False, multiProcess: bool = False)
Distribute the maximal number of minimally separated items within the available areas
Returns a list of x/y coordinates (in the ExclusionCalculator's srs) of each placed item
Inputs: separation : The minimal distance between two items - float : The separation distance when axialDirection is None - (float, float) : The separation distance in the axial and transverse direction
pixelDivision - int : The inter-pixel fidelity to use when deciding where items can be placed
threshold : The minimal availability value to allow placing an item on
maxItems - int : The maximal number of items to place in the area
* Used to initialize a placement list and prevent using too much memory when the number of placements gets absurd
outputSRS : The output SRS system to use
* 4326 corresponds to regular lat/lon
output : A path to an output shapefile
axialDirection : The axial direction in degrees
- float : The direction to apply to all points
- np.ndarray : The directions at each pixel (must match availability matrix shape)
- str : A path to a raster file containing axial directions
maxAcceptableDistance : A maximum distance to allow between items
- Computes a post-placement distance matrix for the located placements
- If the placement's nearest neighbor is greater than `maxAcceptableDistance`, then it is removed
- Input can be given as:
- Y[float] - Meaning that the nearest neighbor must be within the given distance, Y
- (Y1[int], Y2[float], ...) - Meaning that the first neighbor must be within a distance of Y1,
the second nearest neighbor should be within a distance of Y2, and so forth.
- Ex.
- "maxAcceptableDistance=(1000, 2000, 3000)" means that if the nearest 3 neighbors are not within a
distance of 1000, 2000, and 3000 meters, respectively, then the placement in question will be deleted
sepScaling : An additional scaling factor which can be applied to each pixel
- float : The scaling to apply to all points
- np.ndarray : The scalings at each pixel (must match availability matrix shape)
- str : A path to a raster file containing scaling factors
avoidRegionBorders - bool: If True, a distance of half the separation distance (or the mean for different values
in axial and transversal direction) is kept from the region edges to avoid placements in immediate proximity
in neighbouring regions. Other than excludeRegionEdge, this will not affect the eligibiliyt of the region,
only the locations of the placements will be adapted. By default False.
Source code in glaes/core/ExclusionCalculator.py
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saveAreas
¶
Saves distributed areas into output shp file.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
output
|
str
|
output file path. If None, dataframe will be returned |
None
|
srs
|
anything acceptable by gk.geom.transform()
|
|
None
|
data
|
list / Series / array
|
additional |
None
|
description data of your choice, e.g. enumeration etc. Note
|
|
required | |
savePolygons
|
bool
|
If set to False, area |
True
|
Returns:
| Type | Description |
|---|---|
|
pd.DataFrame(): Dataframe with geom column, area column (area |
|
|
always in m² independent of geom srs), possibly lat and lon columns |
|
|
for centroid location if polygons saved as geom |
Source code in glaes/core/ExclusionCalculator.py
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WeightedCriterionCalculator
¶
Bases: object
Source code in glaes/core/WeightedCriterionCalculator.py
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addCriterion
¶
Exclude areas as calcuclated by one of the indicator functions in glaes.indicators
- if not 'value' input is given, the default buffer/threshold value is chosen (see the individual function's docstring for more information)
Source code in glaes/core/WeightedCriterionCalculator.py
checkMultiProcessingAvailability
¶
Multiprocessing is not available on all operating systems. If the user wants to to use multiprocessing on an unsupported operating system, multiprocessing will be deactivated and a warning appears.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
multiProcess
|
bool
|
A flag indicating whether multiprocessing should be used as indicated by the user. If multiprocessing is not available for the operating system, multiprocessing will be deactivated and a warning appears. |
required |
Returns:
| Type | Description |
|---|---|
bool
|
The corrected value for multiprocessing availability. |