Prof. Y. Lupardi
Members-
Posts
158 -
Joined
-
Last visited
Everything posted by Prof. Y. Lupardi
-
Geocaching Banned - The End Of Geocaching
Prof. Y. Lupardi replied to twilliams's topic in General geocaching topics
With fear growing in the population there will be more incidents concerning caches. A thread in this forum with subject 'Panic about a cache' will have its regular contributions in the future. I cannot image a total worldwide ban on geocaching activities. But should things detoriate in de USA resulting in a ban on geocaching then you can be sure that geocaching in France will become a national pastime there. Special geocaching hollidays and honeymoons to France will be organised. But it is the technical progress that will change our sport. There will come a day when we have some kind of super-WAAS and we can find a spot not with 10 meter accuracy but with 1 meter. What kind of impact will that have on your geocaching behaviour? -
French caches are at http://www.cistes.net/ La personne qui a caché une ciste est le "Cacheur", et les personnes qui la trouvent sont évidemment des "Trouveurs" !
-
I have some caches using beautifull army-green 'medical supply' boxes. One time the whole box and contents disappeared, one time only the box was gone (contents left in plastic bag by thief).
-
I also have GPS12 for a few years and he proved to be very sturdy and waterresistant. Not as many bells and whistles as modern units but the basic functions are all right. You can buy new ones: they are still in production as far as I know and as such are the longest selling GPSr's.
-
... but you will need to change your AAA batteries from 110 to 220 volts And upgrade the stuff: in Europe they have 50 Hz and not 60 cycles/sec
-
And for the Netherlands (where Amsterdam is) you have maps at http://www.geocaching.nl/maps/seek.php?action=nederland
-
Thanks for the link. Did not think about the metric degrees called gons in this context. And the centigon correspondents to the km. I only once found a French map with gons for position (from the zero meridian of Paris). Surveyers here also use gons and I see the Leica TM5100A theodolite advertised with Angular measurement Standard deviation per ISO17123-3, 1 σ 1): 0.5“ (0.15 mgon)
-
Not a big problem: I can recalculate it with my built-in brain. Conversion miles <--> km is not terrible difficult. But sometimes it is: when the TB crosses the Big Ocean and part of the tripdistance is counted in nautical miles. Lucky me: there are no nautical km's invented (yet?)!
-
Benchmark Hunt In The Netherlands
Prof. Y. Lupardi replied to Prof. Y. Lupardi's topic in Benchmarking
Oh yes that one. Very nice tourist attraction that gives some religious or emotional dimension to something very down-to-earth. Here you can find a picture Café Restaurant Nieuw Amsterdam Peil (not a coffie shop:-) It is not the real one and only zero marker for our national (and later for our neighbour countries) NAP-level. This one was specially levelled from the marker that sits under an lid on the Dam (lively centre of town). But that one is one of an whole network of underground markers that are sunk into deep old sandlayers. And now with modern equipment we found out that the Amsterdam marker is not stable compared to the others in the network... But it is very difficult to get something stable in an part of the world that is sinking down already for many millions of years (and being filled up with sediments.). -
Benchmark Hunt In The Netherlands
Prof. Y. Lupardi replied to Prof. Y. Lupardi's topic in Benchmarking
You mean GC509A : Dutch - RD Benchmarks ? This virtual cache can be used to log finds for bench marks. But the data is unstructured. (on date of visit, not position) -
The same mismatch is well know in the world of printed books for students. A USA book costing $50 in the US when exported to say India will be equivalent to the cost of one month living and studying there. The solution in this case has been: reprint the books in India for this market only. Of course the license fees are also on Indian level. But they sell 10 times more of those standaard studybooks in India then in the USA! So that compensates. Maybe something like this can be done with the membership. Those foreign memberships could be limited to access to local data only.
-
Benchmark Hunt In The Netherlands
Prof. Y. Lupardi replied to Prof. Y. Lupardi's topic in Benchmarking
The site is a big success. Since the start just 10 days ago more then 500 benchmarks are visited and nearly 10 were proven to be ''no longer there'. There are about 5000 left to visit. And for the future? There are also NAP-benchmarks (for height only) to find; about 34.000 -
Why not transform your UK-only coins to the Europeanwide EU-coins? The cheap way to go is: take 20 cent coins and find someone who can press numbers into these coins. At the same time you can cater for the needs of nationalists because EU-coins have all a nation-specific side.
-
40-50 Houses Around The Cache!?!?!
Prof. Y. Lupardi replied to NuBi's topic in General geocaching topics
In the centre of my old town (Europe, Netherlands) there is a cache named ' Leiden Urban 1' placed in an unused drain at the back of a house, easy reachable from the street. The place (space) is surrounded with high buildings full of windows where University students live (about 500 totally) and creepy creepy... hundreds of eyes will follow your every move!. The cache is already more then 2 years old and disappeared (and sometimes reappeared) a few times. -
Yes, after some time we managed to setup a benchmark hunt for our small country with only 5000+ marks to visit. It is done in cooperation with our Geographic Institute (Kadaster, Rijksdriehoeksmeting). We hunt using the local grid coordinates (Dutch Grid off course) and make photographs of the object in question and the surroundings. The Survey Service is very glad to have information concerning their marks because they cannot themselves check them all regularly. We already made them happy (?) with telling them about some disappeared and unuseable benchmarks. Take a look at our site http://www.geocaching.nl/benchmark/ We have maps (=kaarten) with the status of all the points.
-
Geeky?? Once I walked around not so much with a safety vest but with a safety helmet. And on it was my GPS. Nowadays GPSr 's are not as heavy as my good old GPS12 and there are nifty active antennas and re-rediators. So I would like very much a Geocaching Cap not only with reflecting material for safety but also with a pocket for the antenna. Like this:
-
Without doubt have a precise clock when there are not enough satellites in vieuw for resolving the time-part of the equations (=less then 3 stats) is welcome but: " The physics package, or atomic works, of the clock is 9.5 cubic millimeters, or about the size of a grain of rice, and keeps time accurately enough that it is likely to be off by no more than 25 microseconds per day, which translates to no more than a second per 126 years, said Leo Hollberg, a group leader in the Time and Frequency Division at the National Institute of Standards and Technology (NIST). " So we have 1 microsecond error in an hour. Taking the awfull fast velocity of light then that translates to: how many meters of error you can expect in an hour to accumulate? But it sounds nice 'I have an atomic clock in my GPSr'. And without doubt in a few years new GPSr will be advertised as 'much better because of the atomic clock'.
-
Can anybody tell me what the text is (translated) that is on these benchmarks? They are found in Japan.
-
Here in the Netherlands the benchmarks come in 3 kinds: 1. old triangulation points, mostly well-defined tops of towers of churches 2. the new GPS Kernnet points, on the ground with clear vieuw of the sky, easy accessiblity with car, and plenty of room to put your GPS antenna nicely above the mark. These marks are simple bald nails (with a very small driiled hole in it ) and set in stable concrete stuctures. Position is given in mm. 3. nails in walls of structures. Many are 2 meters or more above ground. Only the GPS points have a confirmed precise height. For height measurements we have a different set of marks: NAP. These have no associated precise position and when in a wall then about 20-30 cm above ground. How they use those nails high up on walls to get position: I do not know.
-
Inappropriate Items Left In Cache
Prof. Y. Lupardi replied to Bobfireman's topic in General geocaching topics
I got a log from my cache "Biertje?" telling me that a closed zip-bag full of wet rotting leaves was removed from the cache. -
Your Vehicle For Geocache Travels
Prof. Y. Lupardi replied to PatrickD's topic in General geocaching topics
My transportation: You can all read it here My GPS transport a bicycle with a small 29 cc 2-stroke grassmower-type petrol engine No shock absorbers (only the saddle and pneumatic tyres). -
Try the Belgium geocaching shop at http://www.geocacher.be/ Alternatively goto http://www.geocaching.nl/shop/ but then: delivery takes longer and a hassle with across-border bank payment .
-
I heard some remark about size. I do not know if the picture shown in my browser is in the good ratio but the tag seems to be broader. Now they are 1 inch plus 1/8 and 2 inch 2/8 Would it be possible to make them according to the metric international-standard, this being an international sport? They would be then 3 cm x 6 cm.
-
With great pleasure I can announce that in the very near future we will have our benchmark site for the Netherlands up and running. We have full cooperation with the "Kadaster" that takes care of our geodetic points. We have a list of all current (5400 about) points with a precision (in the Dutch metric grid) of 1 meter. Also available to us are the texts describing the whereabout of nails etc. (in West wall, 2.35 m from North wall and 0.68 cm from ground.) And we have all the (b/w) schetches of these points . Also a communication line has been set up to inform them of damaged points because nowadays they have no emplyees to check on their condition regularly. And our points are mostly tops of churchtowers etc. from the days before GPS. There are about 410 GPS points now (with distances of about 10km) distributed in the country. Further also in Belgium they do benchmark hunting. http://www.geocaching.be/web/kernet/index.php
-
Do All Garmins Shut Off While Mounted On An Atv?
Prof. Y. Lupardi replied to GrnXnham's topic in GPS technology and devices
Nowadays batteries and especially the NiMh types are not up to the old standard of size. So they tend to rattlle around in their compartments. It is not only the longitudinal movement that makes a no-connect but also the lateral (they buckle). Try some simple tape around them so they fit snuggly. In my Garmin GPS12 this trick does wonders!