Bidwill Testline PM90306 Shalvey, New South Wales, Australia
By
Geocaching Australia on 16-Sep-15. Waypoint TP7199
Cache Details
| Difficulty: | |
| Terrain: | |
| Type: | TrigPoint |
| Container: | Other |
| Coordinates: | S33° 43.649' E150° 48.990' (WGS 84) |
| 56H 297697E 6265918N (UTM) | |
| Elevation: | 51 m |
| Local Government Area: | Blacktown City |
/150.8165,-33.727483,14/400x200?access_token=pk.eyJ1IjoiY2F1Z2h0YXR3b3JrIiwiYSI6ImNqa2l4ZzNzMDE5bjgzdm1sZGpuODF1Mm0ifQ.q8YMzVyzDJJlJHHV8EMjwQ)
Description
A Trig Point is a virtual cache which requires a cacher to locate the Trigonometric Station at GZ.
This trig is part of a survey testline made up of seven markers: PM90301 to PM 90307. It is still in use as it was being utlised by surveyors on the day of discovery.
A trig point (also known as a Trigonometric Station) typically consists of a black disc on top of four metal legs or concrete pillar, resembling a navigation beacon. It is also accompanied by a metal disc, which is located directly below the center point of the tripod or on top of the pillar itself.
Trig points are generally located at the top of hills or points of prominence in the landscape. Many provide unique views and challenges, with some being difficult to access.
These points were regarded as valuable to surveyors, providing reference points for measuring distance and direction, and assisting in the creation of maps.
To log a find on the Geocaching Australia website, you will need to include a picture of the trig point, along with your GPS receiver and (preferably) yourself. Long distance / telephoto type pictures are against the spirit of this cache. You are encouraged to leave a description of your journey in your log to help others in finding the trig point.
The original collection of trig points has been sourced from Geoscience Australia and may contain inaccuracies.
Please respect local laws and regulations when searching for trig points. If you believe that a trig point is located on private property or in a dangerous location, you may archive the cache, by clicking on 'Log this Cache' and placing an 'Archived' log on the Geocaching Australia website.
If you feel that you can add to the description of this trig point or adjust the difficulty/terrain ratings, please feel free to edit this cache and amend the information suitably. Vandalism of the cache description or other information will result in your account being terminated.
Logs
Snapped required pic which has been added to the gallery We haven't done a testline for a bit, so it became a focus of this morning.... We were wishing we could drive up the park though!
Found the Bidwell Testline after work today during a work trip up in the Penrith region. While I mainly looked for GC caches, when an easy GCA cache comes along we go for that as well. Trigs are particularly nice to track down and find. I was very happy when they became part of the GCA cache family. Its especially satisfying if you have made a big climb up for one ! I have also now joined dragonZone in Clan Cerberus, so there are more reasons to find those GCA caches. Its interesting to find the many different types of trigs. From the traditional metal legs and vanes, to the concrete base with vanes, to the ones on top of water tanks (especialy the red ones !), as well the new CORS type. When you look on a GCA map and see all those hundreds and hundreds of blue 'Z's it shows just how many there are out there. Shame so many are on private property and cannot be accessed at all. So as far as I'm concerned every trig that can be found and photographed is a real bonus !
The trig was quickly 'found'. Piccie taken and posted. Six down one to go.
Thanks Geocaching Australia !
.Found @ 1907, Friday, 18/11/16, and photographed.
Being in the area this morning I stopped here to walk the line of trigs. There were surveyors in attendance as well. Apparently this test line of seven trigs is set up so Surveyors can bench test to calibrate their gear. They have a requirement to do this at least once a year.
A pleasant walk up the incline to collect the seven then a down hill walk back to the car.
Found with rogerw3. Had a great stroll along a most unusual line of trigs!
