mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-31 00:06:02 -04:00
214 lines
8.2 KiB
Python
214 lines
8.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
Grid.py
|
|
---------------------
|
|
Date : May 2010
|
|
Copyright : (C) 2010 by Michael Minn
|
|
Email : pyqgis at michaelminn dot com
|
|
***************************************************************************
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
|
|
__author__ = 'Michael Minn'
|
|
__date__ = 'May 2010'
|
|
__copyright__ = '(C) 2010, Michael Minn'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
import os
|
|
import math
|
|
|
|
from qgis.PyQt.QtGui import QIcon
|
|
from qgis.PyQt.QtCore import QVariant
|
|
from qgis.core import (QgsRectangle,
|
|
QgsCoordinateReferenceSystem,
|
|
QgsField,
|
|
QgsFeatureSink,
|
|
QgsFeature,
|
|
QgsGeometry,
|
|
QgsPoint,
|
|
QgsLineString,
|
|
QgsWkbTypes,
|
|
QgsProcessing,
|
|
QgsProcessingException,
|
|
QgsProcessingParameterEnum,
|
|
QgsProcessingParameterExtent,
|
|
QgsProcessingParameterNumber,
|
|
QgsProcessingParameterCrs,
|
|
QgsProcessingParameterFeatureSink,
|
|
QgsFields)
|
|
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
|
|
class GridLine(QgisAlgorithm):
|
|
EXTENT = 'EXTENT'
|
|
HSPACING = 'HSPACING'
|
|
VSPACING = 'VSPACING'
|
|
HOVERLAY = 'HOVERLAY'
|
|
VOVERLAY = 'VOVERLAY'
|
|
CRS = 'CRS'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def icon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'vector_grid.png'))
|
|
|
|
def tags(self):
|
|
return self.tr('grid,lines,vector,create,fishnet').split(',')
|
|
|
|
def group(self):
|
|
return self.tr('Vector creation')
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def initAlgorithm(self, config=None):
|
|
self.addParameter(QgsProcessingParameterExtent(self.EXTENT, self.tr('Grid extent')))
|
|
|
|
self.addParameter(QgsProcessingParameterNumber(self.HSPACING,
|
|
self.tr('Horizontal spacing'), QgsProcessingParameterNumber.Double,
|
|
0.0001, False, 0, 1000000000.0))
|
|
self.addParameter(QgsProcessingParameterNumber(self.VSPACING,
|
|
self.tr('Vertical spacing'), QgsProcessingParameterNumber.Double,
|
|
0.0001, False, 0, 1000000000.0))
|
|
self.addParameter(QgsProcessingParameterNumber(self.HOVERLAY,
|
|
self.tr('Horizontal overlay'), QgsProcessingParameterNumber.Double,
|
|
0.0, False, 0, 1000000000.0))
|
|
self.addParameter(QgsProcessingParameterNumber(self.VOVERLAY,
|
|
self.tr('Vertical overlay'), QgsProcessingParameterNumber.Double,
|
|
0.0, False, 0, 1000000000.0))
|
|
|
|
self.addParameter(QgsProcessingParameterCrs(self.CRS, 'Grid CRS', 'ProjectCrs'))
|
|
|
|
self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT, self.tr('Grid'), type=QgsProcessing.TypeVectorLine))
|
|
|
|
def name(self):
|
|
return 'creategridlines'
|
|
|
|
def displayName(self):
|
|
return self.tr('Create grid (lines)')
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
hSpacing = self.parameterAsDouble(parameters, self.HSPACING, context)
|
|
vSpacing = self.parameterAsDouble(parameters, self.VSPACING, context)
|
|
hOverlay = self.parameterAsDouble(parameters, self.HOVERLAY, context)
|
|
vOverlay = self.parameterAsDouble(parameters, self.VOVERLAY, context)
|
|
|
|
bbox = self.parameterAsExtent(parameters, self.EXTENT, context)
|
|
crs = self.parameterAsCrs(parameters, self.CRS, context)
|
|
|
|
width = bbox.width()
|
|
height = bbox.height()
|
|
|
|
if hSpacing <= 0 or vSpacing <= 0:
|
|
raise QgsProcessingException(
|
|
self.tr('Invalid grid spacing: {0}/{1}').format(hSpacing, vSpacing))
|
|
|
|
if hSpacing <= hOverlay or vSpacing <= vOverlay:
|
|
raise QgsProcessingException(
|
|
self.tr('Invalid overlay: {0}/{1}').format(hOverlay, vOverlay))
|
|
|
|
if width < hSpacing:
|
|
raise QgsProcessingException(
|
|
self.tr('Horizontal spacing is too small for the covered area'))
|
|
|
|
if height < vSpacing:
|
|
raise QgsProcessingException(
|
|
self.tr('Vertical spacing is too small for the covered area'))
|
|
|
|
fields = QgsFields()
|
|
fields.append(QgsField('left', QVariant.Double, '', 24, 16))
|
|
fields.append(QgsField('top', QVariant.Double, '', 24, 16))
|
|
fields.append(QgsField('right', QVariant.Double, '', 24, 16))
|
|
fields.append(QgsField('bottom', QVariant.Double, '', 24, 16))
|
|
fields.append(QgsField('id', QVariant.Int, '', 10, 0))
|
|
fields.append(QgsField('coord', QVariant.Double, '', 24, 15))
|
|
|
|
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
|
|
fields, QgsWkbTypes.LineString, crs)
|
|
|
|
if hOverlay > 0:
|
|
hSpace = [hSpacing - hOverlay, hOverlay]
|
|
else:
|
|
hSpace = [hSpacing, hSpacing]
|
|
|
|
if vOverlay > 0:
|
|
vSpace = [vSpacing - vOverlay, vOverlay]
|
|
else:
|
|
vSpace = [vSpacing, vSpacing]
|
|
|
|
feat = QgsFeature()
|
|
feat.initAttributes(len(fields))
|
|
|
|
count = 0
|
|
id = 1
|
|
|
|
# latitude lines
|
|
count_max = height / vSpacing
|
|
count_update = count_max * 0.10
|
|
y = bbox.yMaximum()
|
|
while y >= bbox.yMinimum():
|
|
if feedback.isCanceled():
|
|
break
|
|
|
|
pt1 = QgsPoint(bbox.xMinimum(), y)
|
|
pt2 = QgsPoint(bbox.xMaximum(), y)
|
|
line = QgsLineString()
|
|
line.setPoints([pt1, pt2])
|
|
feat.setGeometry(QgsGeometry(line))
|
|
feat.setAttributes([bbox.xMinimum(),
|
|
y,
|
|
bbox.xMaximum(),
|
|
y,
|
|
id,
|
|
y])
|
|
sink.addFeature(feat, QgsFeatureSink.FastInsert)
|
|
y = y - vSpace[count % 2]
|
|
id += 1
|
|
count += 1
|
|
if int(math.fmod(count, count_update)) == 0:
|
|
feedback.setProgress(int(count / count_max * 50))
|
|
|
|
feedback.setProgress(50)
|
|
|
|
# longitude lines
|
|
# counters for progressbar - update every 5%
|
|
count = 0
|
|
count_max = width / hSpacing
|
|
count_update = count_max * 0.10
|
|
x = bbox.xMinimum()
|
|
while x <= bbox.xMaximum():
|
|
if feedback.isCanceled():
|
|
break
|
|
|
|
pt1 = QgsPoint(x, bbox.yMaximum())
|
|
pt2 = QgsPoint(x, bbox.yMinimum())
|
|
line = QgsLineString()
|
|
line.setPoints([pt1, pt2])
|
|
feat.setGeometry(QgsGeometry(line))
|
|
feat.setAttributes([x,
|
|
bbox.yMaximum(),
|
|
x,
|
|
bbox.yMinimum(),
|
|
id,
|
|
x])
|
|
sink.addFeature(feat, QgsFeatureSink.FastInsert)
|
|
x = x + hSpace[count % 2]
|
|
id += 1
|
|
count += 1
|
|
if int(math.fmod(count, count_update)) == 0:
|
|
feedback.setProgress(50 + int(count / count_max * 50))
|
|
|
|
return {self.OUTPUT: dest_id}
|