Merge branch 'develop'

Conflicts:
	README.md

Author: ldesousa

README.md

@@ -29,26 +29,64 @@ and usage of hexagonal raster grids. These tools rely on the
 Future work includes the development of a Graphical User Interface (GUI) for 
 these tools on QGIS, making the usage of hexagonal grids even simpler.
 
+
 This tool suite can be installed from the [PyPi repository](https://pypi.python.org/pypi/hex-utils).
 
 
 
-Software dependencies
+
+Installation Requirements
 -------------------------------------------------------------------------------
 
-The `hasc2gml` script requires the GDAL library. On Debian based systems it can
-be installed with the following command:
+The `hasc2gml` script requires the Python GDAL library; the `asc2hasc` script 
+requires the `scipy` library. At this moment there are no functional universal 
+Python packages available for these libraries. Therefore system specific 
+packages are required in these cases. On Debian based systems they can be 
+installed with the following command:
+
+`sudo apt install python3-gdal python3-scipy` 
+
+The Python package manager is required to install dependencies; on Debian based 
+systems it can be obtained like:
+
+`sudo apt install python3-pip`
+
+Installing from PyPi
+-------------------------------------------------------------------------------
+
+The easiest way to install `hex-utils` is through the universal package 
+available from the Python Package Index (PyPi); an example again on Debian 
+based systems:
+
+`sudo pip3 install hex-utils`
+
+Installing from GitHub
+-------------------------------------------------------------------------------
+
+Start by cloning the repository to your system:
+
+`git clone [email protected]:ldesousa/hex-utils.git`
+
+Change to the new folder:
+
+`cd hex-utils.git`
+
+It is possible to install directly from the `master` branch, but it is more 
+advisable to use of the [tagged releases](https://github.com/ldesousa/hex-utils/releases), 
+*e.g.*:
+
+`git checkout tags/v2.2`
 
-`apt install python-gdal` 
+Then install the scripts system wide:
 
-It can also be installed from the PyPi repository (the best option for virtual 
-environments):
+`sudo python3 setup.py install`
 
-`pip instal GDAL`
+Finally, install the remaining dependencies:
 
+`sudo pip3 install -r requirements.txt`
 
 Licence
 -------------------------------------------------------------------------------
 
-This suite of programmes is released under the EUPL 1.1 licence. For further 
-details please consult the LICENCE file.
+This suite of programmes is released under the [EUPL 1.1 licence](https://joinup.ec.europa.eu/community/eupl/og_page/introduction-eupl-licence). 
+For full details please consult the LICENCE file.

hex_utils/asc.py

@@ -88,7 +88,7 @@ def _getNeighbourhoodGridCoords(self, i, j):
             ii.append(i-1)
             jj.append(j)
 
-            if j < self.nrows - 1:
+            if j < self._nrows - 1:
                 ii.append(i-1)
                 jj.append(j+1)
 
@@ -99,11 +99,11 @@ def _getNeighbourhoodGridCoords(self, i, j):
         ii.append(i)
         jj.append(j)
 
-        if j < self.nrows - 1:
+        if j < self._nrows - 1:
             ii.append(i)
             jj.append(j+1)
 
-        if i < self.ncols - 1:
+        if i < self._ncols - 1:
 
             if j > 0:
                 ii.append(i+1)
@@ -112,7 +112,7 @@ def _getNeighbourhoodGridCoords(self, i, j):
             ii.append(i+1)
             jj.append(j)
 
-            if j < self.nrows - 1:
+            if j < self._nrows - 1:
                 ii.append(i+1)
                 jj.append(j+1)
 

hex_utils/hasc.py

@@ -58,19 +58,21 @@ def init(self, ncols, nrows, xll, yll, side, nodata = "", angle = None):
     def _loadHeader(self):
 
         # Mandatory header
-        self._set_ncols(self._loadHeaderLine(self._file.readline(), self._key_ncols,  type(1)))
-        self._set_nrows(self._loadHeaderLine(self._file.readline(), self._key_nrows,  type(1)))
-        self._xll     = self._loadHeaderLine(self._file.readline(), self._key_xll,    type(1.0))
-        self._yll     = self._loadHeaderLine(self._file.readline(), self._key_yll,    type(1.0))
-        self._set_side( self._loadHeaderLine(self._file.readline(), self._key_side,   type(1.0)))
+        ncols = self._loadHeaderLine(self._file.readline(), self._key_ncols,  type(1))
+        nrows = self._loadHeaderLine(self._file.readline(), self._key_nrows,  type(1))
+        xll   = self._loadHeaderLine(self._file.readline(), self._key_xll,    type(1.0))
+        yll   = self._loadHeaderLine(self._file.readline(), self._key_yll,    type(1.0))
+        side  = self._loadHeaderLine(self._file.readline(), self._key_side,   type(1.0))
         # Optional headers
         self._nextLine = self._file.readline()
-        self._nodata = self._loadHeaderLine(self._nextLine, self._key_nodata, type("a"), True)
-        if self._nodata != "" :
+        nodata = self._loadHeaderLine(self._nextLine, self._key_nodata, type("a"), True)
+        if nodata != "" :
             self._nextLine = self._file.readline()
-        self._angle  = self._loadHeaderLine(self._nextLine, self._key_angle, type(1.0),  True)
-        if self._angle != None :
+        angle = self._loadHeaderLine(self._nextLine, self._key_angle, type(1.0),  True)
+        if angle != None :
             self._nextLine =  self._file.readline()
+            
+        self.init(ncols, nrows, xll, yll, side, nodata, angle)
 
 
     def _saveHeader(self, f):
@@ -111,11 +113,8 @@ def saveAsGML(self, outputFilePath):
 
         newField = ogr.FieldDefn("value", ogr.OFTReal)
         outLayer.GetLayerDefn().AddFieldDefn(newField)
-    
-        # The perpendicular distance from cell center to cell edge
-        perp = math.sqrt(3) * self._side / 2
 
-        # Edge coordinates of an hexagon centered in (x,y) and a side of d:
+        # Edge coordinates of an hexagon centered in (x,y) having a side of d:
         #
         #           [x-d/2, y+sqrt(3)*d/2]   [x+d/2, y+sqrt(3)*d/2] 
         #
@@ -125,23 +124,59 @@ def saveAsGML(self, outputFilePath):
 
         for j in range(self._nrows):
             for i in range(self._ncols):
+                
                 x = self._xll + i * 3 * self._side / 2
-                y = self._yll + j * 2 * perp
+                y = self._yll + j * 2 * self._hexPerp
                 if (i % 2) != 0:
-                    y += perp
+                    y += self._hexPerp
 
                 polygon = ogr.CreateGeometryFromWkt("POLYGON ((" +
-                    str(x - self._side)     + " " +  str(y)        + ", " +
-                    str(x - self._side / 2) + " " +  str(y - perp) + ", " +
-                    str(x + self._side / 2) + " " +  str(y - perp) + ", " +
-                    str(x + self._side)     + " " +  str(y)        + ", " +
-                    str(x + self._side / 2) + " " +  str(y + perp) + ", " +
-                    str(x - self._side / 2) + " " +  str(y + perp) + ", " +
-                    str(x - self._side)     + " " +  str(y)       + "))")
+                    str(x - self._side)     + " " +  str(y)                 + ", " +
+                    str(x - self._side / 2) + " " +  str(y - self._hexPerp) + ", " +
+                    str(x + self._side / 2) + " " +  str(y - self._hexPerp) + ", " +
+                    str(x + self._side)     + " " +  str(y)                 + ", " +
+                    str(x + self._side / 2) + " " +  str(y + self._hexPerp) + ", " +
+                    str(x - self._side / 2) + " " +  str(y + self._hexPerp) + ", " +
+                    str(x - self._side)     + " " +  str(y)                 + "))")
 
                 outFeature = ogr.Feature(feature_def=outLayer.GetLayerDefn())
                 outFeature.SetGeometryDirectly(polygon)
                 outFeature.SetField("value", self._grid[i][self._nrows - j - 1])
                 outLayer.CreateFeature(outFeature)
+             
 
-    
+    def saveAsGeoJSON(self, outputFilePath):
+           
+        try:
+            from geojson import Feature, Polygon, FeatureCollection, dump
+        except ImportError:
+            raise ImportError(""" ERROR: Could not find the GeoJSON Python library.""")
+        
+        collection = FeatureCollection([])
+        
+        for j in range(self._nrows):
+            for i in range(self._ncols):
+                
+                x,y = self.getCellCentroidCoords(i, j)
+                
+                collection.features.append(
+                    Feature(
+                        geometry = Polygon([[
+                            (x - self._side,      y                 ),  
+                            (x - self._side / 2,  y - self._hexPerp ), 
+                            (x + self._side / 2,  y - self._hexPerp ), 
+                            (x + self._side,      y                 ),                 
+                            (x + self._side / 2,  y + self._hexPerp ),
+                            (x - self._side / 2,  y + self._hexPerp ), 
+                            (x - self._side,      y                 )
+                           ]]), 
+                        properties = {"value": self._grid[i][self._nrows - j - 1]}))
+        
+        with open(outputFilePath, 'w') as fp:
+            dump(collection, fp)
+        
+        
+        
+              
+           
+                

hex_utils/hasc2geojson.py

@@ -0,0 +1,63 @@
+#!/usr/bin/python3
+# coding=utf8
+#
+# Copyright (c) 2016 - Luís Moreira de Sousa
+#
+# Transforms ASCII encoded cartographic hexagonal grids [0] into GeoJSON.
+# A geometric hexagon is generated for each grid cell and encoded as a feature
+# in the output JSON file. The cell value is saved in the 'value' attribute of 
+# the new feature. 
+#
+# Author: Luís Moreira de Sousa (luis.de.sousa[@]protonmail.ch)
+# Date: 11-10-2016 
+#
+# [0] https://github.com/ldesousa/HexAsciiBNF
+
+import sys
+from hex_utils.hasc import HASC
+
+def wrongUsage():
+    
+    print("This programme requires two arguments:\n" +
+          " - path to an input HASC file \n" +
+          " - path to the output GeoJSON file \n" + 
+          "Usage example: \n"
+          "   hasc2gml /path/to/input.hasc /path/to/output.json")
+    sys.exit()
+
+
+def processArguments(args):
+    
+    global inputFile
+    global outputFile
+    
+    if len(args) < 3:
+        wrongUsage() 
+    else:
+        inputFile = str(args[1])
+        outputFile = str(args[2])
+    
+
+# ----- Main ----- #
+def main():
+        
+    processArguments(sys.argv)
+    
+    hexGrid = HASC()
+    
+    try:
+        hexGrid.loadFromFile(inputFile)
+    except (ValueError, IOError) as ex:
+        print("Error loading the grid %s: %s" % (inputFile, ex))
+        sys.exit()
+    print ("Loaded input HASC, converting...")
+    
+    try:
+        hexGrid.saveAsGeoJSON(outputFile)
+    except (ImportError, IOError) as ex:
+        print("Error saving the grid %s: %s" % (inputFile, ex))
+        sys.exit()
+    print ("Conversion successfully completed.")
+
+main()
+    

hex_utils/surface2asc.py

@@ -5,7 +5,7 @@
 #
 # Creates a rectangular ESRI ASCII grid by sampling a a given surface.
 # Usage example:
-# surface2asc -x 0 -y 0 -X 2000 -Y 2000 -s 20 -m surfaces.surfaceGaussian -f fun -o output.asc
+# surface2asc -x 0 -y 0 -X 2000 -Y 2000 -s 20 -m surfaces.eat2Gaussian -f fun -o output.asc
 #
 # Author: Luís Moreira de Sousa (luis.de.sousa[@]protonmail.ch)
 # Date: 03-06-2016 

hex_utils/surface2hasc.py

@@ -5,8 +5,8 @@
 #
 # Creates an hexagonal ASCII grid [0] by sampling a a given surface.
 # Usage examples:
-# surface2hasc -x 0 -y 0 -X 2001 -Y 2001 -s 12.4080647880 -m surfaces.surfaceGaussian -f fun -o output.hasc
-# surface2hasc -x 0 -y 0 -X 2001 -Y 2001 -s 13.2191028998 -m surfaces.surfaceGaussian -f fun -o output.hasc
+# surface2hasc -x 0 -y 0 -X 2001 -Y 2001 -s 12.4080647880 -m surfaces.eat2Gaussian -f fun -o output.hasc
+# surface2hasc -x 0 -y 0 -X 2001 -Y 2001 -s 13.2191028998 -m surfaces.eat2Gaussian -f fun -o output.hasc
 #
 # [0] https://github.com/ldesousa/HexAsciiBNF
 #

setup.py

@@ -5,9 +5,16 @@
 
 setup(
     name = "hex-utils",
-    version = "0.2",
+    version = "0.2.2.3",
     packages = find_packages(),#['utils'],
-    install_requires=[],
+    install_requires=[
+        'cycler',
+        'numpy',
+        'pyparsing',
+        'python-dateutil',
+        'pytz',
+        'six',
+    ],
     entry_points={
         'console_scripts': [
             'hasc2gml=hex_utils.hasc2gml:main',

surfaces/channel.py

@@ -0,0 +1,48 @@
+'''
+Created on 12 Oct 2016
+
+@author: desouslu
+'''
+
+import math
+import numpy as np
+from mpl_toolkits.mplot3d import Axes3D
+import matplotlib.pyplot as plt
+from surfaces.surface import Surface
+
+class Channel(Surface):
+    
+    angle = 30
+    slope = 0.25
+    centre_x = 5
+    centre_y = 5
+    centre_z = 5
+    radius = 0.5
+    depth = 1
+    
+        
+    def __init__(self, slope = None):
+    
+        if slope != None: 
+            self.slope = slope
+        
+    
+    def fun(self, x, y):   
+        
+        plane = ((self.centre_x - x) * self.slope + self.centre_z) * math.cos(math.radians(self.angle)) + \
+                ((self.centre_y - y) * self.slope + self.centre_z) * math.sin(math.radians(self.angle))                    
+               
+        centre = (x - self.centre_x) / math.sin(math.radians(90 - self.angle)) * \
+                 math.sin(math.radians(self.angle))
+    
+        if  (y - self.centre_y) >= (centre - self.radius) and \
+            (y - self.centre_y) <= (centre + self.radius): 
+            return plane - self.depth
+        else:
+            return plane 
+        
+
+# Uncomment these lines to test a single pit.    
+c = Channel()
+c.plotWireFrame()
+