Digital Land Area Measuring Device

[euca]

Just spent 90-minutes searching this forum and Google.  There was something in this forum a while ago.  Needless to say I can't find it when I want it.  Can anyone please advise.  I want to buy a digital device which, I am told, one points to the four, or more, corners of a field and, presto, a read-out gives the area exactly in a variety of measures including rai.  What works reliably, accurately and where to buy it would be much appreciated.

[pnustedt]

I use a Garmin GPSMAP 60CSx. It involves walking around the area you need to measure with the device.

Suppliers in Thailand are Eagle GPS from Chang Mai (sponsors of the map forum). However you will find it much cheaper to buy abroad - I bought mine in Hong Kong for less than half the Thai price.

It is reliable and solves many disputes.

[mixedbreed]

I use a Garmin GPSMAP 60CSx. It involves walking around the area you need to measure with the device.

Suppliers in Thailand are Eagle GPS from Chang Mai (sponsors of the map forum). However you will find it much cheaper to buy abroad - I bought mine in Hong Kong for less than half the Thai price.

It is reliable and solves many disputes.

We have 2 of them (Garmin GPS60). 1 for each harvester, just walk around the field, sometimes before to give a quote, otherwise afterwards.

Bought from Garmin in Singapore 2 years ago.

[c64]

@Pnustedt

Those garmins you got, can you get the DGPS module for them?

I'm a bit spoiled at work where we got IALA, spotbeam and another correction signal for the DGPS. Accurate down to 1,3 meters. Once when we were doing a job that demanded high precision they upgraded the spotbeam for a while (read: paid more $$$$$$) and we got an accuracy down to 3 cm

[pnustedt]

@Pnustedt

Those garmins you got, can you get the DGPS module for them?

I don't know, but it does have a microSD card. Suggest you ask Eagle GPS in Chang Mai.

[David006]

@Pnustedt

Those garmins you got, can you get the DGPS module for them?

I don't know, but it does have a microSD card. Suggest you ask Eagle GPS in Chang Mai.

I used an older Garmin Marine hand held GPS for the walk around but needed to do a bit of math and convert.

As an aid to conversions many real estate sites have on-line converters ...sq meters to rai etc..

1 Talang Wah = 4 Sqm =

40 Sq Ft

1 Ngan = 400 Sqm =

4.000 Sq Ft

1 Rai = 1.600 Sqm =

17.222 Sq Ft

2.5 Rai = 1 Acre =

40.000 Sq Ft

[c64]

@Pnustedt

Those garmins you got, can you get the DGPS module for them?

I don't know, but it does have a microSD card. Suggest you ask Eagle GPS in Chang Mai.

Heh . No, was just wondering.

Obviously you can not on those garmins. It's almost like a little box that you connect to the unit. It receives signals ie from radio and will provide a better accuracy. Don't think they'll fit in the SD slot

[WatersEdge]

Hi David006

Your conversion factors are in the neighborhood,

Good enough for Government Work,

we used to say

if close enough was just as good for the application

If it had to be more precise,

the retort was,

Close only counts in horseshoes and hand grenades

If you are doing anything that involves money,

Note that there are 10.76 ft2/m2

Not that any of us would have need to use ft2 or acres,

but should it matter, an Acre is 43,560 ft2

Even though I'm an American raised on Acres, Sections, Townships, Ranges, Baseline & Meridians,

I say the Hectare should be used if no compelling reason prohibits.

It is 10,000 m2, exactly, every time.

If it's on the square, 100 this way, 100 perpendicular.

I can't think of a more awkward way of measuring than the Acre.

43,560 ft2...What's with such a silly number?

208.71 feet square....Why not 200 or at least 210?

Indeed, Why not 100? A truly round number.

Then we made a Section of 640 Acres...that's 1 mile square.

A Mile is 5,280 feet....anyone see a pattern of intentional chaos?

We commonly divide the Section into Quarter Sections of 160 acres,

then divide that again by 4 to get 40 acres.

None of those numbers have a square root that means anything.

A Township is 36 Sections....is it random posing as order?

At least a Township is 6 miles square....But why couldn't it have been 10?

It's no mystery to me that Surveyors are commonly Alcoholics.

To the infamous characters who gathered long ago in good old Britain,

to solemnly affirm that the Imperial System was a good idea,

wish you were still around to receive a piece of my mind!

To the brilliant minds who subsequently gave us the SI measurements

I assume you are French, because we still call it Systeme Internationale

Thanks for the Metric System with bountiful decimals never wavering.

The answer to everything is 1, 10, 100, 1,000, 10,000

I therefore must admit, The French did make a contribution to the world after all.

All in good fun I should explain.

The Brits surely did more than just mess us up with their daffy measurements.

The world still depends on their language to trade and learn by.

I'm thankful I was required to study French.

The French may very well have accomplished more than good measurements.

Don't they make good food?

Brits can't claim that.

If someone now is provoked to make fun of Americans,

I can't deny that we have it coming.

We do seem to be completely losing our way after a pretty fair start.

[slapout]

We will not even go into the effect the earth's curvature has on the measurements mentioned nor the use of a correction (jog) line used in this system. Then throw in surface area in hill country and look at the acres of surface contained in a section, etc. Then throw in the measurements used for distance, land, air, sea, space etc. and if that does not confuse you throw in the weight systems used. The only measurement I ever felt comfortable with was the six pack related distance. Point A to Point B should be measured in the six packs consumed during the journey. The speed and gut capacity is fairly consistent with the individual under most adverse conditions encountered.