Which GPS or routing app can give ford warnings?

Discussion in 'Mapping & Navigation' started by Myway, Sep 27, 2017.

  1. Myway

    Myway Long timer

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    When you get all the fords out of Openstreetmap database and you make a poi file out of it.
    as *.gpx or *.csv or else.

    Which gps or routing app can be used, that give a warning, visual and/or sound, like with speedcamera's?

    How is this done?
    #1
  2. Myway

    Myway Long timer

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    #2
  3. gundrted

    gundrted Been here awhile

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    Do you mean ford as in ford a stream?

    Sent from my SM-G930U using Tapatalk
    #3
  4. DaMonk45

    DaMonk45 I B Da Monk

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    @chrisjk yes, how they should be taged in the map data is becoming a topic.
    The hows and why of it and why.
    #4
  5. Myway

    Myway Long timer

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    Yes, a stream.
    https://wiki.openstreetmap.org/wiki/Tag:ford=yes

    In Openstreetmap it can be tagged on a node [​IMG] and a way [​IMG]
    But we have One feature, one element, so it is a node or the way gets ford=yes, not both.
    https://wiki.openstreetmap.org/wiki/One_feature,_one_OSM_element

    On a way the first and last waynode must be set on the riverbank ( but when that is not drawn in yet as a polygon) it should be set where the riverbank is, land goes over in ford water, full wide river.
    Then the length of the ford is known.

    For me it is important that you know the first or last waynode of the ford. Depends, from what side your coming. This could be the point warning in the gps.
    Over 250 meters, there is a ford.
    But
    A ford with a node on the place where the line waterway cross the river, this is further and you get the warning too late.

    How to get the first and last waynode of a fordway. in/out of the ford.
    http://overpass-turbo.eu/s/s1I
    We can export this to ...................
    advfordfirstlast.png

    or the waynode where the waterway cross the fordway.
    http://overpass-turbo.eu/s/s1J
    advfordwaterway.png
    You see the icon that is set on the middle of the fordway.

    But now the not good , two element tags, one feature ford.
    http://overpass-turbo.eu/s/s1L
    Then you get two icons but there is one ford/feature.
    Below the images of the above link.
    twoelements1.png

    twoelements2.png

    Because the waterway line (purple) is not in the middle of the this, render makes two icons for the map, because of two elements!.
    But if the waterway line is in the middle, the render show one, because he can/will not project two icons slightly above each other, this makes a less readable map.
    The render decides, how to project. But two elements is the base.

    See those two pink dots, in out of the ford on the riverbank. ( here the riverbank polygon is not draw yet).
    Important to know. When I make a roadbook this is the warningpoint !!!


    We could make a POI database of fords, so that gps with a POI warningsystem could give a beep.

    A intelligent routing app, could take the first (pink) as the point to calculate from where in front of the ford, to give a warning. And set there a icon to go into the ford.
    For me fords should be on the way, maybe a small ford less then 4 meter, could be a node.
    #5
  6. ohgood

    ohgood Just givver tha berries !!!

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    locus map can


    pick the distance
    Screenshot_2017-09-27-17-11-01.png
    pick the type of notification
    Screenshot_2017-09-27-17-11-05.png
    pick the folder full of waypoints
    Screenshot_2017-09-27-17-11-47.png

    then ride and get notified upon reaching them. I like to get a increasing frequency of beeps as I get closer.
    #6
    Myway likes this.
  7. Myway

    Myway Long timer

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    Garmin GPS
    https://www.garmin.com/us/maps/poiloader

    Is there a list with devices that have proximity alerts?
    #7
  8. kurviger

    kurviger Bloke from Kurviger.de

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    #8
  9. txingui

    txingui Adventurer

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    #9