Geograph - photograph every grid square

The photo ID number may be found at the end of the address (URL) of the photo page e.g. http://www.geograph.org.uk/photo/1234567

Interior shots are not the main purpose of the site, but we do include them, ideally cross-linked to an exterior shot for context. This generally only applies to publicly accessible places and to sites of a particular interest. Interior shots are always supplemental* images, but they can add valuable information and are generally welcome.

*(From 11 May 2016 the Supplemental Classification is replaced by Image Type Tags:
see http://www.geograph.org.uk/article/Image-Type-Tags-update ).

All submitted images have a unique identity number. It forms the last part of the URL (web address) of the main photo page.
example: http://www.geograph.org.uk/photo/4 is the first 'live' image on the site and has the ID number 4 (we don't use leading zeroes) while http://www.geograph.org.uk/photo/4018397 was the four millionth to go 'live' on the site (we do get a few rejects or failures) and has the ID number 4018397.

There are three simple ways to link two (or more) photos.
To produce a link which simply shows as Link, add the full URL of the photo to be linked to in the description eg
"See http://www.geograph.org.uk/photo/5966333 for a wider view."
To produce a link which shows the grid square and title, enclose the photo ID number (found at the end of the photo page URL) in double square brackets [[5966333]] so the link (in this example) will show as "See SO1189 : The Berwyns under snow for a wider view."
Either way it is a good idea to describe the other photo a bit, rather than just give the link.
For linking several photos a shared description - which may only be a title - can work well. Create your shared description in the Shared Description tab and then add it to each of the relevant images. This will produce an automatic link "see other photos of [title of shared description]"
For recent uploads such linkings are most easily done using the Recent Uploads page https://www.geograph.org.uk/submissions.php where the ID numbers are provided below the thumbnails and you won't need to visit individual edit pages to add the links.

The main picture on Geograph should be free from annotations because different people may want to use it in different contexts. However, annotated pictures demonstrating features such as geological or geographical details are very welcome. Please upload annotated versions to Geograph's media repository http://media.geograph.org.uk/ and link them from the description of the original image uploaded to Geograph's main archive. This article http://www.geograph.org.uk/article/Howto-Crosslinking-descriptions shows how to make such links.

The media repository can also be used for out-of-copyright images such as old postcards to compare with the same scene in a current geograph, or for user-generated maps of the area.

You can also annotate other people's images and link them as external images from an article you're writing. To get started with article writing, have a look at this overview: http://www.geograph.org.uk/article/Help_on_formatting_of_articles .