OSI GeoHive map viewer, 6" maps, what's A R P ?

[kob3203]

When you look at any of the 6" maps on the OSI's map viewer ( https://webapps.geohive.ie/mapviewer/index.html ) each townland has the same three letters, A R P, below it with three numbers. These obviously mean something, but what ?

Some townlands also have  "Including # # # water" under this. What does that mean ?

(I couldn't find the answer on the OSI or GeoHive site, so I'm hoping somebody here knows)

[Kiltaglassan]

    A         R            P
  Acres  Roods    Perches

[Kiltaglassan]

Some townlands also have  "Including # # # water" under this. What does that mean ?

From your map example,  water has 0 acres, 1 rood, 1 perch in the townland.

[kob3203]

Thank you - my mind had got stuck on the ARP warden in Dads Army and wouldn't let go !

[Kiltaglassan]

Land Measures in Ireland

Acres, Roods and Perches
1 acre = 4 roods and 1 rood = 40 perches . Perches are also called poles or chains and equal 21 feet when referring to length and an area 21 feet by 21 feet when used to measure area.
So when you see an area in the records as-
         102 A 2 R 10 P      This is in fact 102 acres 2 roods and 10 perches .

http://www.shrule.com/?page_id=1563

[Wexflyer]

Land Measures in Ireland

Acres, Roods and Perches
1 acre = 4 roods and 1 rood = 40 perches . Perches are also called poles or chains and equal 21 feet when referring to length and an area 21 feet by 21 feet when used to measure area.
So when you see an area in the records as-
         102 A 2 R 10 P      This is in fact 102 acres 2 roods and 10 perches .

http://www.shrule.com/?page_id=1563

God bless you for a patriot!

You have defined an Irish acre, which is based on the 21 ft perch!

Those nasty, foreign, new-fangled English acres use a 5.5 yard perch.

[shanreagh]

Wait till you are subjected to hectares and square metres. Actually I hope you are never subjected to this change

We have these beasties here in NZ and now have no acres roods or perches whether English or Irish.

I worked in a Lands dept and never really got to grips with hectares.  My eye was attuned to be able to visualise acres roods perches. 

[Andy J2022]

Wait till you are subjected to hectares and square metres. Actually I hope you are never subjected to this change

We in Great Britain and in Ireland have had to use Hectares for several decades in any official matters concerning land area, thanks to numerous European Union Directives on the subject.
The same directives also tried to outlaw the British (and Irish) pint (0.563 litre) but it has managed to cling on in day to day use, just as many products are sold with the weight of 450 grams which is approximately 1 pound in weight. We have also managed to retain miles for measuring road distances (and in speed, so miles per hour). The gallon has largely disappeared as a unit of volume for things like fuel. Feet and inches versus centimeters is largely a generational thing, as is Fahrenheit versus Celsius (aka centigrade).
Vive la diffιrence!

[Wexflyer]

Wait till you are subjected to hectares and square metres. Actually I hope you are never subjected to this change

We in Great Britain and in Ireland have had to use Hectares for several decades in any official matters concerning land area, thanks to numerous European Union Directives on the subject.
The same directives also tried to outlaw the British (and Irish) pint (0.563 litre) but it has managed to cling on in day to day use, just as many products are sold with the weight of 450 grams which is approximately 1 pound in weight. We have also managed to retain miles for measuring road distances (and in speed, so miles per hour). The gallon has largely disappeared as a unit of volume for things like fuel. Feet and inches versus centimeters is largely a generational thing, as is Fahrenheit versus Celsius (aka centigrade).
Vive la diffιrence!

"We" Kemosabe?

Ireland has used km and km/hr for distances and speed limits for many years now.
Also been many years since I heard anyone mention a temperature in Fahrenheit.