Hi! Usually, there is a blue circle showing on my Vista HCx when the position quality is bad. As more satellites are being located, it grows smaller and vanishes when the positioning is good. Recently I have observed that a large circle is showing permanently, even when the positioning is very good (+-3 m). In the GPS forum it was mentioned that the behaviour of the circle depends on the map, so I'm asking the question here, too. Has anybody observed this behaviour? Is there anything during map generation that may influence it? bye Nop
Usually, there is a blue circle showing on my Vista HCx when the position quality is bad. As more satellites are being located, it grows smaller and vanishes when the positioning is good.
Recently I have observed that a large circle is showing permanently, even when the positioning is very good (+-3 m). In the GPS forum it was mentioned that the behaviour of the circle depends on the map, so I'm asking the question here, too.
Has anybody observed this behaviour? Is there anything during map generation that may influence it?
I have observed this behaviour some days ago too. Erroneously I had no valid map, but only the 'test-map:all-elements' on my etrex. While biking around, I detected that the precision cycle always has an constatnt radius of 260m. I assume this is the precision, where the recalculation started in the maps generated with older mkgmap versions. So I assume there is some setting in the gmapsupp.img which sets the 'precision' of the map data. The higher value from map precision and actual precision gets displayed at the circle.
Hi!
I assume this is the precision, where the recalculation started in the maps generated with older mkgmap versions. So I assume there is some setting in the gmapsupp.img which sets the 'precision' of the map data. The higher value from map precision and actual precision gets displayed at the circle.
The discussion over at the GPS forum points towards a setting inside the map, too. It seems mkgmap marks the maps as terribly inaccurate so the maximum precision is an inaccuracy of 260m. Does anybody know what setting is responsible for this precision idication and how to change it to a more accurate setting? bye Nop
Nop wrote:
The discussion over at the GPS forum points towards a setting inside the map, too. It seems mkgmap marks the maps as terribly inaccurate so the maximum precision is an inaccuracy of 260m.
With my maps generated with mkgmap my eTrex Legend HCx shows the circle correctly, i.e. it disappears when the GPS position precision is good enough.
Hi! Ralf Kleineisel schrieb:
Nop wrote:
The discussion over at the GPS forum points towards a setting inside the map, too. It seems mkgmap marks the maps as terribly inaccurate so the maximum precision is an inaccuracy of 260m.
With my maps generated with mkgmap my eTrex Legend HCx shows the circle correctly, i.e. it disappears when the GPS position precision is good enough.
Ok, so we have 2 with the problem, one without. Let's try to figure out the difference. Does anybody have any idea where in the map this setting is stored? bye Nop
For me on Vista HCx it's working as well. Once position is accurate, precision circle is very small. Nop wrote:
Hi!
Ralf Kleineisel schrieb:
Nop wrote:
The discussion over at the GPS forum points towards a setting inside the map, too. It seems mkgmap marks the maps as terribly inaccurate so the maximum precision is an inaccuracy of 260m.
With my maps generated with mkgmap my eTrex Legend HCx shows the circle correctly, i.e. it disappears when the GPS position precision is good enough.
Ok, so we have 2 with the problem, one without. Let's try to figure out the difference.
Does anybody have any idea where in the map this setting is stored?
bye Nop _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Ok, so we have 2 with the problem, one without. Let's try to figure out the difference.
Subtract one of the two :-) I have only a 'problem', when using the testmap or no map at all (i.e. basemap of unit). Btw: Maybe the big circle only occurs when the unit is *off* the testmap. I'm not sure what happens if the actual position is *on* the map. If I use a reasonable map with the default style and the latest revision (or some older) of mkgmap then everything works fine for me.
Hi! Johann Gail schrieb:
Subtract one of the two :-)
I have only a 'problem', when using the testmap or no map at all (i.e. basemap of unit). Btw: Maybe the big circle only occurs when the unit is *off* the testmap. I'm not sure what happens if the actual position is *on* the map.
If I use a reasonable map with the default style and the latest revision (or some older) of mkgmap then everything works fine for me.
Hm, I am definitely on the map. I use a highly customized style, but no dirty tricks included, only a lot of simple rules. bye Nop
participants (4)
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Felix Hartmann -
Johann Gail -
Nop -
Ralf Kleineisel