mtravis’s gists

mtravis / ogr2vrt_27700.py

Last active September 7, 2017 15:46

Adapted the original ogr2vrt.py script to create a OSGB ready vrt file that references a tab file for use in QGIS - no more having to change the CRS!

	#!/usr/bin/env python
	# -- coding: utf-8 --
	###############################################################################
	# $Id$
	#
	# Project: OGR Python samples
	# Purpose: Create OGR VRT from source datasource
	# Author: Frank Warmerdam, [email protected]
	#
	###############################################################################

mtravis / total_area_layer.sql

Created November 17, 2016 14:50

Creates a SQL statement that will output the total area of each layer in a PostGIS database

	Select 'Select ''' \|\| quote_ident(f_table_name) \|\| ''' as name, Sum((ST_Area(' \|\| quote_ident(f_geometry_column) \|\| ')) from '
	\|\| quote_ident(f_table_schema) \|\| '.' \|\| quote_ident(f_table_name) \|\| ' UNION'
	FROM geometry_columns
	order by f_table_name

mtravis / L.Control.MousePosition27700.js

Last active April 27, 2023 07:53

Leaflet mouse position plugin adapted for BNG (EPSG:27700)

	//Adpated by mtravis from https://github.com/ardhi/Leaflet.MousePosition/ for use with BNG co-ords. Inspired by http://ghost.mixedbredie.net/reprojecting-leaflet-coordinates/
	//You will still need Leaflet.MousePosition/src/L.Control.MousePosition.css from the original repo for this to work
	//Also include a link to https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.3.10/proj4.js
	//Finally add L.control.mousePosition().addTo(map); to the your script

	L.Control.MousePosition = L.Control.extend({
	options: {
	position: 'bottomleft',
	separator: ' : ',
	emptyString: 'Unavailable',

mtravis / snapping.py

Last active October 17, 2015 15:59

turn snapping on/off in QGIS

	from qgis.core import *
	from qgis.utils import iface
	from PyQt4.QtCore import *
	from PyQt4.QtGui import *

	def snapping_toggle():
	layer = QgsMapLayerRegistry.instance().mapLayersByName("topographicline")[0]
	#layer = iface.activeLayer()
	_, enabled, _, _, _, _ = QgsProject.instance().snapSettingsForLayer(layer.id())
	QgsProject.instance().setSnapSettingsForLayer(layer.id(), not enabled, 0, 1, 10, True)

mtravis / mapCenter

Created June 27, 2015 09:43

QGIS Python Function to get map canvas center

	from qgis.core import *
	from qgis.gui import *
	from qgis.utils import iface

	@qgsfunction(args=0, group='Custom')
	def mapCenter(value1,feature, parent):
	x = str(int(iface.mapCanvas().extent().center().x()))
	y = str(int(iface.mapCanvas().extent().center().y()))
	point = x + ',' + y
	return point

mtravis / lr_plym_sparql

Last active August 29, 2015 14:13

	prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
	prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
	prefix owl: <http://www.w3.org/2002/07/owl#>
	prefix xsd: <http://www.w3.org/2001/XMLSchema#>
	prefix sr: <http://data.ordnancesurvey.co.uk/ontology/spatialrelations/>
	prefix lrhpi: <http://landregistry.data.gov.uk/def/hpi/>
	prefix lrppi: <http://landregistry.data.gov.uk/def/ppi/>
	prefix skos: <http://www.w3.org/2004/02/skos/core#>
	prefix lrcommon: <http://landregistry.data.gov.uk/def/common/>

mtravis / Loader_Linux

Created April 8, 2013 17:34

Loader config for Linux

	# Note: Environment variables can be used with any of
	# the options by using a token of the form:
	# $HOME, ${HOME} or %TEMP% (Windows only)

	# The directory containing your source files.
	# All supported files in the specified directory and
	# it's descendants will be loaded.
	src_dir=/home/matt/loader/data/import/

	# The directory used to store the translated data

mtravis / Draw.Circle with getRadius

Created March 16, 2013 09:45

	L.Draw.Circle = L.Draw.SimpleShape.extend({
	statics: {
	TYPE: 'circle'
	},

	options: {
	shapeOptions: {
	stroke: true,
	color: '#f06eaa',
	weight: 4,

mtravis / Gazetteer.vrt

Last active December 13, 2015 17:38

	<OGRVRTDataSource>
	<OGRVRTLayer name="50kgaz2012_new">
	<SrcDataSource>C:\OSOpenData\Data\Gazetteer\50kgaz2012_new.csv</SrcDataSource>
	<GeometryType>wkbPoint</GeometryType>
	<LayerSRS>EPSG:27700</LayerSRS>
	<GeometryField encoding="PointFromColumns" x="EAST" y="NORTH"/>
	</OGRVRTLayer>
	</OGRVRTDataSource>

mtravis / gist:4663130

Created January 29, 2013 09:56

	# The directory containing your source OS Open Data
	# files. All files in the specified directory and it's decendents will be loaded.
	src_dir=C:\OSOpenWorkingArea\Data\

	# The .csv file containing parameters for each dataset
	csv_table=C:\OSOpenWorkingArea\Table.csv

	# Database the datasets will be loaded into
	database=dbname='OSOpenData' user='postgres' host='localhost' password='postgres'

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