# Worldmap accuracy

**URL:** <https://discourse.nodered.org/t/worldmap-accuracy/47970>\
**Category:** Dashboard\
**Created:** [3 July 2021 10:04 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970 "2021-07-03T10:04:09Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![ping](https://avatars.discourse-cdn.com/v4/letter/p/f14d63/32.png) [@ping](https://discourse.nodered.org/u/ping)\
**Post date:** [3 July 2021 10:04 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/1 "2021-07-03T10:04:09Z")

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I am passing latitude and longitude of my location to worldmap. I chose OpenStreetmap. It shows my area but my spot is located on the opposite block of where I am.

Any advise please?

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**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [3 July 2021 10:43 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/2 "2021-07-03T10:43:34Z")

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Welcome to the forum @ping

How many digits lat/lon are you entering?  
If you put those values directly into openstreetmap and google maps what do they show?

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**Author:** ![ping](https://avatars.discourse-cdn.com/v4/letter/p/f14d63/32.png) [@ping](https://discourse.nodered.org/u/ping)\
**Post date:** [3 July 2021 11:39 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/3 "2021-07-03T11:39:30Z")

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It shows the block opposite my block.

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**Author:** ![ScheepersJohan](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/scheepersjohan/32/39556_2.png) [@ScheepersJohan](https://discourse.nodered.org/u/ScheepersJohan)\
**Post date:** [3 July 2021 11:43 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/4 "2021-07-03T11:43:41Z")

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You need need maybe more decimal places on you coordinates. And you can verify with google that you coordinates are correct, like @Colin mentioned.

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [3 July 2021 12:38 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/5 "2021-07-03T12:38:57Z")

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How are you getting the co-ordinates in the first place ? eg mobile phone can easily "wander" +/- 50m as the satellites whizz past unless you can "see" 5 or so.

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**Author:** ![hotNipi](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/hotnipi/32/383_2.png) [@hotNipi](https://discourse.nodered.org/u/hotNipi)\
**Post date:** [3 July 2021 12:55 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/6 "2021-07-03T12:55:06Z")

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Can't complain at all.

 ![mapcompare](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/e/2e633073d0fa3d50f58a8137060814cb3d66980f.jpeg)

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**Author:** ![TotallyInformation](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/totallyinformation/32/31_2.png) [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Post date:** [3 July 2021 13:15 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/7 "2021-07-03T13:15:26Z")

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Indeed, when using a phone to identify your location it can be a km or more out if it can't get a good GPS fix since it will use phone masts and Wi-Fi networks.

A good 2d fix should only need 3 satellites if I remember correctly. A minimum of 4 to get a 1/2 way decent 3d fix.

You can occasionally get poor map positioning if you are on a steep hillside as well since the maps use an idealised Earth shape and project to a flat plane. That can occasionally leave you a few metres out.

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Well off-topic but a good way to catch out a flat-earther would be to get them to explain how GPS works.

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**Author:** ![ping](https://avatars.discourse-cdn.com/v4/letter/p/f14d63/32.png) [@ping](https://discourse.nodered.org/u/ping)\
**Post date:** [3 July 2021 22:45 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/8 "2021-07-03T22:45:19Z")

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Thank you everyone. And yes , the Lat and long from my GPS module is different from the ones obtained from Google map.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [2 August 2021 22:45 UTC](https://discourse.nodered.org/t/worldmap-accuracy/47970/9 "2021-08-02T22:45:42Z")

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