GPSMap 76CSx for survey work?

Hi All

Here's my objective:

Use a GPS to locate the survey pins on a piece of land I bought in Nova Scotia Canada.

The Plan:

I have a single GPS coordinate on the survey that locates what is called a "co-ordinate Monument" which is placed by the government. From there I have a series of instructions in the form of angles and distances. Example - 143 46' 38" 140.94feet

I've got a guy on Craigslist selling a working 76CSx for $120Cdn ($95US?) which sounds like a decent price to me.

The trouble is that it has no purchased maps and it was only used on the west coast in British Columbia.

So here's what I can't figure out. Will it have a base map for Nova Scotia at all or is it possible it only ever got a western section of basemap?

Second question: If it has a basemap for Nova Scotia do I really need anything more to go bushwacking to find my pins?

As I understand the operation I can input the GPS coordinates for the monument as Waypoint "1" and then "project" a second waypoint by entering the angle and distance. This would give me Waypoint "2" as my corner pin. At that point can I wander around the bush and have the Garmin tell me hotter/colder, left/right sort of thing until it tells me I'm standing on the projected waypoint? Sort of like geocaching for a survey pin right? I've done lots of geocacheing with phones but never owned a Garmin. I suppose that I then put the next angle/distance in and head out in the direction it tells me. I repeat until I've found all my pins right?

If that works without having to buy any topographical maps then I'm all set and I'll buy the unit tomorrow.

Any comments, caveats or warnings?

Thanks in advance for your help!

 

That's great news! Thanks for the reply Nuvi-Nebie.

I pick up the GPS this morning and will load BaseCamp today to figure it out.

 

It doesn't look like there is a function to "project Waypoint" within the BaseCamp software. I have created my first reference waypoint based on the government coordinates but can't project from there using an angle and distance.

I'll try again later today when I get the actual GPS.

 

Using Measure isn't accurate enough, it only has one decimal place on the degrees and it measures distance in miles.

The GPS was a bit of a disappointment as well, I had hoped to input the exact numbers from the survey in degrees/minutes/seconds.xxx but was only given space for degrees and one or two decimal places.

I found a solution though, I used a geocache website that allowed fine grain projections and returned a result in degrees/minutes/seconds.xxx. Then I just manually input the pin locations as waypoints into basecamp, hooked up the device and uploaded them.

I think I'm all set to go now.

Thanks for all the help, I'll post up on how well it all works!

 

Well, yes, it will, but the first pin on my land is 4939.81 feet from the survey monument at an angle of 299 48' 21". If I zoom out to show both waypoints the measurement is in miles, if I zoom in until the measurement is in feet I can only see the monument and the map won't shift when I hit the edge. I suppose I could convert feet to miles but since the angle was only to one tenth of a degree in measure mode it was easier to go outside the Garmin software to do the projections.

In the end it appears that the Garmin software was written for a specific purpose and it wasn't survey work. My attempts to use it in place of very expensive Transoms and survey gear is bound to run into a few problems. This is not a reflection on the Garmin, just a necessary adjustment to apply it to a new purpose.

 

That's interesting, I was under the impression that modern GPS's were accurate to within about 5 feet if they could get signals from enough satellites. I guess that's still not the case and I was wrong about that.

That would certainly explain the lack of granularity on the part of the software, the coders at Garmin likely saw no need to calculate points with more accuracy than the receiver could find them.

I hope I can still find my pins.

 

That's brilliant advice, I never would have thought of triangulating like that. Thanks.