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Introduction

Introduction
Frequently Asked Questions

Tutorials

Astun Loader
Getting Started with Node
PostGIS and QGIS: Powerful Partners

PostGIS SQL Snippets

ST_Intersects and &&
Finding Distinct Features Closest to a Point
Get Extent of Table
Change projection of data
Count number of columns in table
Copy from CSV with delimiter and quotes
Size of Database
Size of schema
Concatenate attributes
Find duplicates
Select by date
Find Invalid Geometries
KNN Function
Size of Database Table
Deleting duplicates from a table
Insert data into particular rows/columns
Update SET

Python Code Snippets

Using PyInstaller to create exe
CPU Count
CSV to SQLite
Create exe with data files
wxPython Splash Screen
Read data from ZipFile
Find and List Files
Getting part of a string
Replacing %s with variables
Get list of subdirectories
Get last folder of a path
Number of CPUs
Get filename from path without extension

GeoWebCache

Tilenaming

Command Prompt Code Snippets

Time a command

GDAL and OGR2OGR

PostGIS to SQLite
Promote to MULTI

1:50k Gazetteer

Header line for 1:50k Gazetteer
Create attribute index for 1:50k Gazetteer
Create Full Text Search (FTS)
Create schema and table
Create spatial index

AddressBase

Create schema and table
Create spatial index
Create attribute indexes
Create Postal Addresses View

AddressBase Plus

Create Geographic Addresses View
Create Postal Addresses View
Create schema and table
Create spatial index
Create attribute indexes

AddressBase Premium

AddressBase Premium Classification Codes
Create schema and tables
Create Postal Addresses View
Postcode and PostcodeLocator difference

BoundaryLine

Create attribute indexes for BoundaryLine
Create schema
Loading code for BoundaryLine to PostGIS

CodePoint Open

CodePoint Open Admin Lookup List
Create Full Text Search (FTS)
Single space for Postcode
Python Script to ESRI Shapefile
Create Lookup table

CodePoint with Polygons

Create schema and tables
Create seperate tables for CodePoint with Polygons

Meridian2

Create Meridian2 Attribute Indexes

OS Locator

Header line for OS Locator
Create attribute indexes for OS Locator

OSMM ITN

Create schema and tables
Create attribute indexes for OSMM ITN
Create spatial indexes for OSMM ITN
Create ITN Lookup table

OSMM Topography Layer

Applying COU
Adding Building Heights to Topo
QGIS CartographicText

OSMM Sites Layer

Create spatial index for OSMM Sites Layer
Create tables for OSMM Sites Layer

OS VectorMap District

Change projection to EPSG:3857

OS VectorMap Local

Create schema and tables
Change projection to EPSG:3857

Strategi

Create attribute indexes for Strategi
Change projection to EPSG:3857

Bash

Writing Bash scripts on windows

Temporary Code

Topo COU Post Processing
OSMM MapBox Post Processing
OSMM MapBox Studio SQL
Core table COU columns
COU indexes

Leaflet

Leaflet Map with GeoJSON popups

JMeter

Using JMeter to test PostGIS

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Size of Database Table

SELECT pg_size_pretty( pg_total_relation_size('tablename') );

Updated less than a minute ago

Deleting duplicates from a table

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