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Adjusting the prominence of displayed POIs

 

This is a longshot, but here goes. Is there anything in the GPX file format (or Garmin's extensions) that would cause POIs to render on the map above the myopic 0.5mi level of zoom?

I realize this may be specific to GPS model, but I am desperate for *anything* that will let me see POIs when zoomed out to a 15-20 mi radius on my Zumo 550. I've already discovered that I can see POIs at 0.5mi (instead of 0.3mi) zoom just by switching to a British English voice (wtf, Garmin?), but that isn't nearly enough.

The reason for this is that I have created this website, which you are all free to use (the code is opensource, too):

http://www.motomapia.com/

It lets you pick a set of bounds and download all Wikimapia places as POIs. Right now it just generates a CSV file, but I could easily make it generate a GPX if there was some setting in there that might affect visibility. Looking at the very poor documentation for the GPX format (and the even poorer documentation for Garmin's extensions) I am not very hopeful, but I figure I should ask the experts before giving up...

The main reason I wrote this tool is to get all the places around the Black Rock Desert in my GPS before this weekend. Ok, that mission is accomplished. Now I just need to be able to *see* these $@#%!! POIs on the map. Is there anything I can do, other than hurl my Zumo out a 2nd story window and buy a GPS that isn't made out of fail?

Thanks in advance,
Jeff

Don't think so

There is nothing in the gpx or Garmin extensions that sets or determines zoom level. The closet thing is DisplayMode but it only deals with how a poi is displayed, and there are only 3 options- SymbolOnly, SymbolAndName, SymbolAndDescription.

The gpx format is only an agreed-upon language for passing the info to Garmin's POILoader, which takes the info and generates a compiled .gpi file that the device then uses. It's up to the device's operating software to control at what level of zoom the poi's get displayed at, and no one really knows the inner workings of the Garmin device software.

Garmin does have other software for generating pois (Content Toolkit) and it uses still another variant of gpx (Rich GPX) but as far as I know there is nothing there dealing with display zoom either.

The built-in pois are part of the map set and as such are 'hard-coded' to display by which layer/level they are stored. I've never tried making a map (because it's not trivial by any means!) but I think you could get them to show up where you want if you built them into your own map.

A far easier solution although not portable, is to load your pois into MapSource or BaseCamp. They will show up at any zoom level there.

--
It's about the Line- If a line can be drawn between the powers granted and the rights retained, it would seem to be the same thing, whether the latter be secured by declaring that they shall not be abridged, or that the former shall not be extended.

Re: Don't Think So

Bummer. Any chance you know of any formal documentation for the GPI format? Looks like somebody has figured it out: http://garmin.gps-data-team.com/poi_manager.php. Again, a super-long shot, but I'm grasping for straws.

JD4x4 wrote:

A far easier solution although not portable, is to load your pois into MapSource or BaseCamp. They will show up at any zoom level there.

Unfortunately busting out the laptop on a motorcycle trip in the Nevada desert just isn't an option wink

Are there any GPS brands that let me load POI markers onto the map without zooming in to near-useless levels?

Thanks,
Jeff

What are you trying to accomplish?

stickfigure wrote:

This is a longshot, but here goes. Is there anything in the GPX file format (or Garmin's extensions) that would cause POIs to render on the map above the myopic 0.5mi level of zoom?

Jeff

Are you wanting some visual indication of your destination, or of a POI along the way, or both?

My goal

jgermann wrote:

Are you wanting some visual indication of your destination, or of a POI along the way, or both?

I'm taking a motorcycle trip out to the Black Rock desert this weekend. There are quite a large number of interesting places marked in this area on Wikimapia, so I created a website (http://www.motomapia.com/) that lets you download Wikimapia places as POIs.

Now that I have the POIs in my Zumo, I really want is to be able to zoom out on the map to see a roughly 20mi X 20mi area with all the POI markers. Then I can look around and see what hot spring, old mine, etc to visit next. Unfortunately I can only see POI markers on the map at 0.5mi zoom level, which only gives me a couple miles of visibility around me.

I guess I also have the general complaint that in rural areas, the Zumo never displays enough detail until you're zoomed in too far. In most of Nevada, when you zoom out a little, the vast majority of the map is blank. I understand the need to reduce detail (Bicimapas is pretty slow in Mexico City), but the algorithm that works for urban zones does not work at all in rural areas where there isn't much density and most of the roads are tiny. This POI issue is a symptom of this same problem - when the density of information is low, I really need to be able to render it at higher zoom levels.

Thanks,
Jeff

My goal

jgermann wrote:

Are you wanting some visual indication of your destination, or of a POI along the way, or both?

I'm taking a motorcycle trip out to the Black Rock desert this weekend. There are quite a large number of interesting places marked in this area on Wikimapia, so I created a website (http://www.motomapia.com/) that lets you download Wikimapia places as POIs.

Now that I have the POIs in my Zumo, I really want is to be able to zoom out on the map to see a roughly 20mi X 20mi area with all the POI markers. Then I can look around and see what hot spring, old mine, etc to visit next. Unfortunately I can only see POI markers on the map at 0.5mi zoom level, which only gives me a couple miles of visibility around me.

I guess I also have the general complaint that in rural areas, the Zumo never displays enough detail until you're zoomed in too far. In most of Nevada, when you zoom out a little, the vast majority of the map is blank. I understand the need to reduce detail (Bicimapas is pretty slow in Mexico City), but the algorithm that works for urban zones does not work at all in rural areas where there isn't much density and most of the roads are tiny. This POI issue is a symptom of this same problem - when the density of information is low, I really need to be able to render it at higher zoom levels.

Thanks,
Jeff

Understand

I understand, but this may be one of those "be careful what you ask for, you might get it" situations. There are some number of POI icons which would completely overlay the display and so not let you see roads and such.

You do get a checkered flag for your destination. You also have the ability to do "routes" which can have multiple way points. I don't know your Zumo so I do not know if waypoints show up.

I would think one solution might be to arrange it such that all of the POIs you want to possible visit today will show up when you do Where To on custom points of interest. You could choose based on distance and then do the same thing once that POI was visited.

Maybe motorcycle mama will weigh in here. She would give good advice.

Magellan Explorist 600

stickfigure wrote:

Are there any GPS brands that let me load POI markers onto the map without zooming in to near-useless levels?
Thanks,
Jeff

I used my hand-held Magellan for many years and it does exactly that. Custom POI show up at all zoom levels. It has a file limit of 500 points. During a long trip I would load a different POI file several times from the SD card.

--
1490LMT 1450LMT 295w

.

jgermann wrote:

...
Maybe motorcycle mama will weigh in here. She would give good advice.

I already gave him some advice when he posted this on the Zumo forum.

Based on his last post in this thread, my recommendation would be to load them as Favorites in order to have them displayed much further out that Custom POIs.

GPX File

When using my Nuvi 765T geocaching I would load a GPX file into the GPX directory on my sd card with the geocaches in it and they would show up no matter what zoom level I chose (which if they were very dense could be an issue as the icons would cover a lot of the map)

But if there are not that many and they are several miles apart it might be an option (assuming this works on a zumo)

Note, not sure if it matters but I used GSAK (Geocaching database tool) to create the GPX files when I did this so I havent done this with an EPE created one.

--
Nuvi2797LMT, Nuvi765T, Oregon450T, Montana650, GPSMAP60csx

TomTom

stickfigure wrote:

Are there any GPS brands that let me load POI markers onto the map without zooming in to near-useless levels?

My TomTom GO 720 shows the POI groups I specify at all zoom levels.

--
TomTom GO 720 (for driving), Samsung Galaxy Nexus (for walking)

Favorites looks like the best solution

The gpi file isn't really documented and what is known about it has come from reverse engineering. I haven't seen any way so far to control the zoom level for a poi, so I'd call it a dead horse.

The Favorites suggestion sounds like the best solution. I don't usually have enough favorites within a typical map view to have noticed that they do show up at as much as a 20 mile view, although you need to turn the display detail to low so the map features are at a minimum so they don't obscure the pois.

When you put a gpx file in the gpx folder, it migrates into your favorites list..that makes sense why condump got the constant display as well.

Nice tip, MM.

--
It's about the Line- If a line can be drawn between the powers granted and the rights retained, it would seem to be the same thing, whether the latter be secured by declaring that they shall not be abridged, or that the former shall not be extended.

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