VolksNav in Cameroon, starting with urban radius r100

Click a red or green circle to discover the national city code of the clicked area.

The blue area shows a quad 100 x 100km. The bended sides "point" to the national pole CM r0.

The definition of the radius r100 allows to build national, urban and indoor location codes based on imaginary clocks which are smarter than room numbers, post codes or other alternatives. They look like this urban example:

  StatusQuo Yaounde m4:7 r22  

This target could be a building, a crossing, a stop point, a bridge etc. within Yaounde. The conventions for this format with hours, minutes and radius are as follows:

element meaning details
StatusQuo prefix of an urban position code

Bases on an relevant point called r0, the urban pole.

Example Yaounde: place A. Ahidjo
m12

reference horizon hour

from urban pole to north,

m3 to sunrise, m6 to south etc. These direction lines divide the city like a cake into 12 m-sectors.
number after ":", e.g. m12:5

horizon minutes,

blue lines

distance to horizon hour,


1 unity = 100 meters

r...,

e. g. r66

radius,

red lines

distance to urban pole,

1 unity = 100m.

The small red circles show "CityName r100" = 10km radius.

 

For more datails, see: Urban systems:

Yaounde CM r0 - Douala CM m9:20 r200 - Bafoussam CM m10:98 r218 - Bamenda CM m10:130 r278 - Buea CM m9:33 r255 - Ebolowa CM m6:40 r111 - Garoua CM m12:210 r640 - Kousseri CM m12:390 r994 - Kribi CM m8:12 r205 - Maroua CM m12:315 r81 - Mt.Cameroon CM m9:42 r263 -

more cities: see right hand

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National Codes, free https://volksnav.de/Cameroon/NationalCodesFree
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https://volksnav.de/converterCameroonFree.exe or https://volksnav.de/CameroonConverterFree.txt (rename to .exe)

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 circles hours minutes

Evolution:

hb