Geograph - photograph every grid square

Here's a quick link to the Ordnance Survey's beginner's guide to grid references: https://www.ordnancesurvey.co.uk/getoutside/guides/beginners-guide-to-grid-references/

Grid references locate places on the map. They consist of one (Ireland) or two (Great Britain) letters followed by an even number of digits. The letters define a (100x100)km^2 square (a 'myriad' in Geograph-speak) and are best looked up on an overview map. The numbers locate the position within that square. To find a location, split the block of numbers in two. The first block is the easting, i.e. the distance from the western edge of the myriad. The second is the northing - the distance from its southern edge.

Grid references always specify square areas, not points. The more digits there are, the smaller is the square referred to, and the higher is the precision of the grid reference. For each pair of digits, the precision increases by a factor of ten: SN58 defines a square of (10x10)km^2, 50km to the east and 80km to the north of the origin of myriad SN. SN5881 is a (1x1)km^2 square 58km east and 81km north of that origin. SN 58272 81324 is a (1x1)m^2 area. When stating a grid reference, the precision given should be in line with the accuracy of the position (how well do we actually know where we are?) and with the size of the object (a building doesn't fit on a 1m^2 footprint).

The system Geograph still uses in Ireland works in exactly the same way, although the Ordnance Surveys of Ireland and of Northern Ireland have recently introduced a different system for their maps. This article http://www.geograph.org.uk/article/Locating-photos---Republic-of-Ireland explains the differences.

Every submitted image has an Ordnance Survey grid reference, which pins it down to a single 1km square in Britain (two letters) or Ireland (one letter). That generates a local map above the photo with a blue ring where the main feature is.

The viewer location can be any distance away but if not a cross grid will always be within the same square. Cross grids include views, longer telephoto shots and normal photos taken near a square border.

When adding your own decide where the primary location is in the view and then use the second black circle to show where you were when you took it.

Our "Change Suggestions" allow any registered user to suggest a change of grid reference, title/comment or other information - simply view the full size image and click the "Suggest an update to this image" link.

http://www.geograph.org.uk/help/changes

On the bottom of your profile page, look for "Download: CSV , XML for Excel 2003 of all images".
This has links to download as Comma Separate Values (CSV) or Excel XML format.

These can be opened in spreadsheet software, eg LibreOffice or Micrsoft Excel.

The URL for these downloads looks like this:
For CSV: http://www.geograph.org.uk/export.csv.php?u=XXXX&supp=1&taken=1&submitted=1&hits=1&tags=1
For Excel: http://www.geograph.org.uk/export.excel.xml.php?u=XXXX&supp=1&taken=1&submitted=1&hits=1&tags=1

The parameters specify what is included. The contributor is u=XXXX, where XXXX is the user ID. If you use a link from your own profile, it will include your own ID.

Other options:
&supp=1 - include photos classed as supplemental
&taken=1 - include taken date
&submitted=1 - include submitted date
&hits=1 - include hit count
&tags=1 - include tags, in a list separated by question marks
&desc=1 - include description
&class=1 - include classification (geograph or supplemental)
&level=1 - include geograph points, eg 1st, 2nd, 3rd
&ll=1 - include latitude and longitude (in separate columns)
&en=1 - include numerical grid reference, in easting and northing, plus figures for precision
&ppos=1 - include photographer position, easting and northing

For more details, see the API help: http://www.geograph.org.uk/help/api#csv

Most GPS receivers allow you to change the datum and display format to OSGB36 and British National Grid, the convention used by the Ordnance Survey of Great Britain. If you're using a GPS built into a mobile phone, this may not be possible, and your coordinates will always be in WGS84 lat/lon format. If you also use your GPS phone to take your geographs, it should store the positions in the GeoExif header, which Geograph should interpret correctly as camera position (via the Geotagged Image option).

Otherwise, you can use the map part of the submission routine ('locate/find on map') and enter your lat/lon coordinates in the format the 'Search' function, in decimal degrees like 56.45657,-4.54675 . This will look up the grid reference for the location and insert it as _subject_ position into the submission dialogue. You may have to adjust this unless the subject was right in front of you.

Alternatively, there is a conversion tool here on Geograph Tools http://www.nearby.org.uk/coord.cgi?f=conv from which you can copy and paste. Or one built into geograph at https://www.geograph.org.uk/latlong.php

(Question asked by Roga and answered by barryhunter, oasthouse and DHL on the forum http://www.geograph.org.uk/discuss/index.php?&action=vthread&forum=18&topic=13483&dontcount=1&page=0#1
Later updated, as conversion tools have changed over time))

Yes provided they are accurately located and meet the usual criteria.

If the underground space is artificial such as a mine or railway tunnel, they can only be classed as "accepted", i.e. tagged as "inside" or "close look", rather than qualifying as a "Geograph".

If the underground space is natural such as a sea-cave, limestone cave etc., then if there is a large enough space in view a Geograph status is possible, but in a small space it would still be accepted as a "close look".

With the exception of straight tunnels, getting an accurate position underground in the absence of a GPS signal and without a detailed map of a cave system is tricky. In many cases it may be best just to give 4-figure grid reference (i.e. not try to locate the photo within the square).