cattivikkio

What an easy solution! Even easier, why don't I just throw away my GPS? So I don't even need to bother removing the file. Problem solved! Seriously, I appreciate the time you took to answer but I had read the posts about how to delete the file. If I wanted to do that, I wouldn't have bothered posting under a new title "Editing...." I understand that the file gets obsolete with time, still with 250,000 caches there's a very high chance that when I'm in some area and I see a cache on my GPS, that cache is still there. If it's not, then I only wasted a few minutes searching, no big deal. It's a bit worse if I spend time re-logging a cache that I had logged and forgot about... Having so many preloaded caches is good for those occasions when I have my GPS with me even if I hadn't planned to be geocaching in that area and therefore had not loaded any PQ. So, just to make it clear and save everybody's time: I know how to delete the file. I'm asking for someone who knows how to edit it or rather (since i know how to edit it), how to recreate the checksum (assuming that's what it is) TIA

Hello, I recently bought a Garmin GPSmap 64st, which came preloaded with 250,000 geocaches. The list contains many of the caches I have already logged, plus many more in countries which I am not planning to visit in the foreseeable future. On the other hand I think it's cool to have preloaded caches, as long as they're in my area and I haven't logged them. So, I would like to be able to edit the list (via a script which I will write) and remove all the caches that I'm not interested in. The problem I'm having is of course that the preloaded caches do not come in a GPX file but rather in a GGZ. More precisely they are in the file preload.ggz, along with preload.sum and preload.ver, under the GGZ folder. I've done some reverse engineering and found out that the preload.ggz is simply a zipped file which contains both the caches (as a bunch of PQ's) and a SQLite3 database used to access the caches on the device. I know I can figure out how to remove the caches and update the database, but I was wondering about the preload.sum file: I'm pretty sure this is some kind of checksum, so I assume if I modify the db I would also have to ricreate the checksum file. Does anyone have any idea on how this checksum (if it is indeed a checksum) is calculated? It is a 4 bytes file, so it's not an md5 for sure. Thanks in advance /cattivikkio

Actually, now that I have tried it, this doesn't solve my problem. I want to be able to load a pocket query containing let's say 10 mysteries that I solved, then edit each one of them and change the coordinates to the real ones BEFORE I set out to find the caches. The "Enter Next Stage" method only works for a cache at a time, it basically creates a duplicate of the cache you're navigating to, the name is Next Stage and you can't edit it, and it only works on the active cache. So I would still need to bring a paper with the real coordinates and modify each cache in turn when I set to find it... so much for paperless geocaching... I was able to edit the cache coordinates on my eTrex Legend HCx: being unable to do so on the 3-times-more-expensive Oregon 450 is a big disappointment... I guess i'll have to write that script after all...

Thanks a lot! You saved my life! I was going to write a script to edit the GPX file before loading it on the GPS but this way it's easier

Hello all, this question seems almost too easy so it is possible that it has already been answered but I wasn't able to find it on this or any other site. How am I supposed to edit the coordinates of a cache stored on the GPS? Note: not a waypoint, but a cache downloaded from geocaching.com via the Send to GPS button or via a Pocket Query). Typically I have this problem when I want to go and find a Unknown cache which I have solved: in order to have all the description, hints, logs etc. I download the Unknown cache as I would any other cache, but then I want to change its coordinates to the real correct coordinates found by solving the mystery. Any help would be greatly appreciated. thanks in advance /Andrea

Hello all, I have bought my first GPS ever about one month ago, an etrex Legend HCx. I use it primarily for geocaching and I discovered some free topo maps available for my country which I want now to upload onto my microSD memory card. I have a gmapsupp.img file which, as far as I know, I am supposed to copy onto the microSD (via USB mass storage mode). The problem is that after I do that, the map is completely invisible to the GPS unit. Even if I go under Setup-> Map Setup-> Info, I do not see a list of maps to choose from. When I mount the unit as USB mass storage, the only thing I see is the .gpx file that holds my saved tracks and the newly uploaded gmapsupp.img file. they both appear under the root of the memory card. Do I need to place the map ina special directory? I have read discording hints about creating a subdirectory called /garmin and putting the map under that. Does anyone know how I am supposed to copy the map to the memory card? Thanks all in advance /andrea