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How to fancifully display your regiohash progress

How it began...

While moving from one flat to another, I had to live without ISP for a few weeks... and as I sat there, determined to waste my time by dedicating it to some totally insane task even without internet access, I came up with this: several active regiohashers have started to create loose tables with minesweeper images showing their progress - why not take this minesweeper thing to the next level and create true regiohash minesweeper boards?

My first proof-of-concept consisted of only a shell script and the wonderful ImageMagick toolset; but with that it took almost 8 seconds to render a full Australia board. So I soon wrote the whole rendering process from scratch in C, but still relied on ImageMagick to do the final XPM->PNG conversion. This brought the Australia rendering time down to 1 second, but a full world map still took ages (almost 10 seconds including data transfer). So finally (more than one year after the project started) I dropped the XPM intermediate step - the PNG images are now written directly from the pixel data courtesy of libpng.

How to use it...

Possible base URLs are: (running v2.111)

Now you just tack the parameters of your choice to it. Here's the list:

  • Querying metadata
    • version: All other parameters are ignored. Returns a PNG image with the current version number.
    • about: All other parameters are ignored. Displays the list of known regions (as text/plain).
  • Selecting (a part of) the world
    • region=name: This is the only mandatory parameter. It takes a colon-separated list of regions. The first one determines the size and shape of the board and has to be the outermost. You may continue the list with successively smaller subregions, but you have to list them without omissions (i.e. region=Europe:Vlaanderen won't work, but region=Europe:Belgium:Vlaanderen will). In order to keep the list short you may use ISO-3166 abbreviations (the about list contains these, too). There is now even an abbreviation W which selects a map of the whole world. - Matching is done top to bottom (continent, nation, state...), so Germany will match DE before Delaware now.
  • Entering your progress manually
    • home=lat.lng: If you want, you can specify your home graticule. If you have visited a geohash there, it will be marked with a green flag instead of a red one.
    • started=yyyymmdd: If you enter your first visited geohash for this regiohash attempt, a day counter (number of days since your first hash in this region) will be added in the top right corner.
    • This is your list of visited graticules.
  • Redirecting the tool to your userpage
    • wikiuser=User: This makes the CGI script attempt to automagically parse your wiki userpage for your home graticule (by looking for an {{ASG}} tag) and your visited geohashes (by including all links that match [[\d{4}-\d\d-\d\d[_ ]-?\d{1,3}[_ ]-?\d{1,3}|). This has some intrinsic weaknesses, though (see below) - but it is so much more comfortable.

Here are a few examples:

What it looks like...

A very old example of my board (not that I've visited more graticules in the meantime - just the date counter in the top-right corner is completely off):

example regiohash

  • The counter in the top left corner shows the remaining graticules of the smallest (sub)region that hasn't been completed yet.

What it still lacks...

  • The tool does not (and will never be able to) know which (sub)region a certain geohash visit pertains to. It would need full Google and DJIA data to accomplish that. Still wikiuser= is not completely useless - someday I'll add a parameter notvisited= so you can still benefit from the comfort of the parser and correct its mistakes.

List of available regions

All this wouldn't have been possible if it weren't for all the submitters who have provided me with maps of regions that would have taken me days to chart... thank you!

Region Subregion submitted by
Germany (DE) Schleswig-Holstein (SH), Niedersachsen (NI), Mecklenburg-Vorpommern (MV), Sachsen-Anhalt (ST), Nordrhein-Westfalen (NW), Brandenburg (BR), Thueringen (TH), Sachsen (SN), Hessen (HE), Rheinland-Pfalz (RP), Saarland (SL), Baden-Wuerttemberg (BW), Bayern (BY), Berlin (BE), Bremen (HB), Hamburg (HH) Hessophanes
Netherlands (NL) Friesland (FR), Groningen (GR), Noord-Holland (NH), Drenthe (DR), Overijssel (OV), Flevoland (FL), Utrecht (UT), Gelderland (GLD), Zuid-Holland (ZH), Zeeland (ZL) Arvid
Belgium (BE) Vlaanderen (VL), Antwerpen (AW), Limburg (LB), Oost-Vlaanderen (OV), Vlaams-Brabant (VB), West-Vlaanderen (WV), Wallonie (WA), Brabant-Wallon (BA), Hainaut (HI), Liege (LI), Luxembourg (LU), Namur (NA) Arvid
Australia (AU) Western Australia (WA), Northern Territory (NT), South Australia (SA), Queensland (QLD), New South Wales (NSW), Victoria (VIC), Tasmania (TAS), Australian Capital Territory (ACT) UnwiseOwl
New Zealand (NZ) -- Greenslime and JimmyNZ
Europe (EU) Iceland (IS), Norway (NO), Sweden (SE), Finland (FI), Ireland (IE), United Kingdom (UK), Denmark (DK), Portugal (PT), Spain (ES), France (FR), Belgium (BE), Netherlands (NL), Germany (DE), Switzerland (CH), Austria (AT), Italy (IT), Slovenia (SI), Croatia (HR), Bosnia and Herzegovina (BA), Serbia (RS), Montenegro (ME), Albania (AL), Macedonia (MK), Greece (GR), Poland (PL), Czech Republic (CZ), Slovakia (SK), Hungary (HU), Romania (RO), Bulgaria (BG), Estonia (EE), Latvia (LV), Lithuania (LT), Belarus (BY), Ukraine (UA), Moldova (MD), Russia (RU) Danatar
South America (SA) Colombia (CO), Venezuela (VE), Guyana (GY), Suriname (SR), French Guiana (GF), Brazil (BR), Bolivia (BO), Paraguay (PY), Uruguay (UY), Argentina (AR), Chile (CL), Peru (PE), Ecuador (EC), Galapagos (GX) Joannac
North America (NA) Canada (CA), United States (US), Mexico (MX), Belize (BZ), Guatemala (GT), El Salvador (SV), Honduras (HN), Nicaragua (NI), Costa Rica (CR), Panama (PA), Bermuda (BM), Bahamas (BS), Cuba (CU), Cayman Islands (KY), Jamaica (JM), Dominican Republic (DO), Haiti (HT), Puerto Rico (PR), Virgin Islands (VI), British Virgin Islands (VG), Anguilla (AI), St. Kitts and Nevis (KN), Antigua and Barbuda (AG), Montserrat (MS), Guadeloupe (GP), Dominica (DM), Martinique (MQ), St. Lucia (LC), St. Vincent and the Grenadines (VC), Barbados (BB),Grenada (GD), Trinidad and Tobago (TT), Netherlands Antilles (AN) Joannac and UnwiseOwl
Africa (AF) Algeria (DZ), Tunisia (TN), Libya (LY), Egypt (EG), Morocco (MA), Western Sahara (EH), Mauritania (MR), Mali (ML), Niger (NE), Chad (TD), Sudan (SD), Eritrea (ER), Ethiopia (ET), Djibouti (DJ), Somalia (SO), Senegal (SN), Gambia (GM), Guinea-Bissau (GW), Sierra Leone (SL), Liberia (LR), Ivory Coast (CI), Burkina Faso (BF), Ghana (GH), Togo (TG), Benin (BJ), Nigeria (NG), Cameroon (CM), Central African Republic (CF), Equatorial Guinea (GQ), Gabon (GA), Congo (CG), Democratic Republic of the Congo (CD), Uganda (UG), Burundi (BI), Rwanda (RW), Kenya (KE), Tanzania (TZ), Zambia (ZM), St. Helena (SH), Angola (AO), Zimbabwe (ZW), Malawi (MW), Mayotte (YT), Namibia (NA), Mozambique (MZ), Comoros (KM), Mauritius (MU), Seychelles (SC), Botswana (BW), Lesotho (LS), Swaziland (SZ), Reunion (RE), South Africa (ZA), Madagascar (MG), Glorioso Islands (IG) Joannac and UnwiseOwl
Canada (CA) Alberta (AB), British Columbia (BC), Manitoba (MB), New Brunswick (NB), Newfoundland And Labrador (NL), Nova Scotia (NS), Northwest Territories (NT), Nunavut (NU), Ontaria (ON), Prince Edward Island (PE), Quebec (QC), Saskatchewan (SK), Yukon Territory (YT) Wmcduff
Chile (CL) Tarapaca (TA), Antofagasta (AN), Atacama (AT), Coquimbo (CO), Valparaiso (VS), O Higgins (LI), Maule (ML), Biobio (BI), Araucania (AR), Los Lagos (LL), Aisen (AI), Magellanes (MA), Santiago Metropolitan (RM), Los Rios (LR), Arica and Parinacota (AP) Wmcduff
United States of America (US) Alabama (AL), Alaska (AK), Arizona (AZ), Arkansas (AR), California (CA), Colorado (CO), Connecticut (CT), Delaware (DE), District Of Columbia (DC), Florida (FL), Georgia (GA), Hawaii (HI), Idaho (ID), Illinois (IL), Indiana (IN), Iowa (IA), Kansas (KS), Kentucky (KY), Louisiana (LA), Maine (ME), Maryland (MD), Massachusetts (MA), Michigan (MI), Minnesota (MN), Mississippi (MS), Missouri (MO), Montana (MT), Nebraska (NE), Nevada (NV), New Hampshire (NH), New Jersey (NJ), New Mexico (NM), New York (NY), North Carolina (NC), North Dakota (ND), Ohio (OH), Oklahoma (OK), Oregon (OR), Pennsylvania (PA), Rhode Island (RI), South Carolina (SC), South Dakota (SD), Tennessee (TN), Texas (TX), Utah (UT), Vermont (VT), Virginia (VA), Washington (WA), West Virginia (WV), Wisconsin (WI), Wyoming (WY) Joannac and UnwiseOwl
Poland (PL) Dolnoslaskie (DS), Kujawsko-Pomorskie (KP), Lubelskie (LU), Lubuskie (LB), Lodzkie (LD), Malopolskie (MA), Mazowieckie (MZ), Opolskie (OP), Podkarpackie (PK), Podlaskie (PD), Pomorskie (PM), Slaskie (SL), Swietokrzyskie (SK), Warminsko-Mazurskie (WN), Wielkopolskie (WP), Zachodniopomorskie (ZP) Charfa

This table is manually kept up to date, so it may contain typos or just be plain wrong at times. If that seems to be the case, ask the tool itself using the version and about parameters (see above).

List of upcoming regions

Just to prevent duplicate work...

Region Progress
Asia Region mapped. Just waiting for a spare month to type up the results.
Mare Pacifica Region mapped, countries forthcoming (honest).

How to add regions

If someone wants to lend a hand, great! I prefer email submissions to <> (that address is already heavily spam-infested, obfuscation would be futile), and the final format looks like this (just making up an example here):


But of course I also accept other forms of submission - converting the data to fit my tool is usually no problem.

  • The tags are taken from ISO-3166-1 and -2, when available. If there is no entry, make one up that doesn't collide with the ISO (e.g. I had to invent GX for Galapagos).
  • Toplevel regions (i.e. continents) only bear their own ISO code, subregions have their parent appended (e.g. EU and DE:EU, respectively). Note that this is the other way round compared to the region= CGI parameter.
  • The two map formats are also equivalent now. The tool converts [o0#] maps to [o0] ones by replacing 0 with o and # with 0. It is just more convenient to chart subregions by copying the parent map and replacing a few 0s, so both are (and will be) supported.
  • I'm zealously sanitizing CGI input: the only accepted characters are [A-Za-z0-9 =.:-] - if your region name contains non-ascii chars, please replace those. (%xx constructs are decoded before matching against that char list, of course.)


Ping me in #geohashing (if I happen to be there) or leave a notice on my talk page.

My agenda

  • Release the code!