Mapping on Geograph

Details of the various maps available on Geograph Website

The "Maps" Page

You're interested in a particular geographical area but aren't looking for any specific subject in particular? The maps pageExternal link is the best starting point for browsing geographically. It offers access to various maps by way of tabs, detailed below. Whichever tab is selected, you can zoom in by clicking inside the map area and use the buttons on the right to navigate or zoom in and out.

Coverage

The Coverage map is often referred to as the Red/Green map. It shows which squares have had at least one Geograph uploaded. Red squares have geographs, green ones haven't. A geographExternal link is a picture which shows a subject in its context in the square named, and is taken from within that square. Orange squares still have other images (e.g. taken from outside the square); we call them supplementals. Green squares haven't had any images uploaded yet.


Photo Mosaic

The Photo Mosaic map shows a 10x10km^2 mosaic of the first geographs submitted to each of the hundred squares in the area. The photo mosaic tab is only visible if you've zoomed in to the finest level by clicking inside the map. Such a 10x10km^2 area is called a hectad.


Personalised

The Personalised map shows the same kind of information as 'Coverage', but limited to only your own pictures - a square is red if you have submitted at least one geograph to it.


Depth

The Depth map shows how many images have been uploaded in total to each square - you can see hotspots in SE England, the major cities but also places like Snowdonia. Generally, the darker the colour, the more pictures we have.


Draggable OS / Centisquare Coverage

These two tabs lead to a separate mapping page based on the Ordnance Survey's 1:50k mapping of Great Britain and adjacent smaller islands. To access these, you need to click a couple of times in the red/green map to zoom in a bit. The difference between the two tabs is the resolution of the coverage overlay shown by default. See section about the draggable OS map below for more information.

Check Sheet

Special text version of the current map (be it Coverage, Personalized, Depth or Recent Only) designed for easy printing to use when out Geographing. This only works at 100km and 10km width scale because of the amount of detail shown. The segment shown on the right shows four grid squares: the one top left is all-at-sea, top right has just one supplemental image, bottom left has two geographs and three supplemental images, and bottom right seven geographs. Grey squares already have geographs, white ones don't. Each square is labelled with its grid reference and the date of the most recent submission.


Printable

Displays the current current graphical map (be it Coverage, Personalised, Depth or Recent Only) in a webpage that should print nicely and in full colour. (Trying to print the map from the main display page usually doesn't work.)

Recent Only (aka TPoint Availability)

'Recent' images in this context are those taken within the last five years. This is especially useful to note squares without recent coverage - so they can be photographed to show changes over time. The first image uploaded within a rolling period of five years preceding the current date earns a "TPoint", so this map is particularly useful for people playing this game.


Clusters Map

Interactive and zoomable map, an alternative way to visualize coverage; zooming in far enough reveals individual photos.



Draggable OS

The Draggable OS mapExternal link is the Ordnance Survey's 1:50k base map with Geograph-specific information shown as an overlay.

Navigation


Overlays

The draggable map has a number of layers available via the Layers Toggle

OSGB Landranger

This is the always on basemap. Ordnance Survey 1:50,000 Raster mapping. Note can also zoom out and get overview mapping.

Gridsquare Coverage

Shows coverage by 1km squares, shows number of photos.

Contributor Depth

Shows coverage by 1km squares, the number is the number of contributors to the square. Helps show where can get 2nd/3rd/4th Points.


TPoint Availability

Shown in purple are squares without a recent photoExternal link. (equivalent to the "recent only" on the normal "Maps" page)

Centisquare Coverage

Coverage by 100m squares. Colour key at bottom of page.

ScenicOrNot Data

Colour coded representation of scenicness. 1-10 scale, lighter/lower = more scenic. Data is sourced from ScenicOrNot websiteExternal link


Other Maps

We also have maps in a few other places...

Photo/Browse pages - Great Britain

Provides 1:50,000 extracts of Ordnance Survey mapping, can also be subsituted for a Interactive Google Maps.

Photo/Browse pages - Ireland

Here we use small extracts of mapping provided by Google Maps.

Search Results

The current page of results can be viewed plotted on a Google Map - select "on a map" from the dropdown top right.
(for many search results pages, can also click 'as KML' at the bottom of the page, to load photos on the Google Maps site, or even Google Earth, which offers some additional features)

Articles

Can embed small extracts of the 1:50,000 OS Raster map, or a page of search results as a Google Map. See this article for more detailExternal link

Creative Commons License Text by Rudi Winter, September 2009 ; This work is dedicated to the Public Domain.
With contributions by Barry Hunter, Alan Murray-Rust and Penny Mayes. (details)
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