# Queries about TTN Mapper

**URL:** <https://www.thethingsnetwork.org/forum/t/queries-about-ttn-mapper/25970>\
**Category:** Uncategorized\
**Created:** [May 13, 2019, 10:54am UTC](https://www.thethingsnetwork.org/forum/t/queries-about-ttn-mapper/25970 "2019-05-13T10:54:42Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![interravikram](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/interravikram/32/38445_2.png) [@interravikram](https://www.thethingsnetwork.org/forum/u/interravikram)\
**Post date:** [May 13, 2019, 10:54am UTC](https://www.thethingsnetwork.org/forum/t/queries-about-ttn-mapper/25970/1 "2019-05-13T10:54:42Z")

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Hi Everyone ,

I have a node(without GPS) which transmits data(2bytes) every minute to a TTN device . The data successfully reaches the device.  
I am having some trouble understanding the working of TTN Mapper. GPS (fake gps) is enabled on the gateway side and also payload format contains “latitude”,longitude and hdop values (all zero).  
In three days i could see only one value being plotted on the ttn mapper.  
I am using the TTN Mapper android application to geotag the data and send to TTN Mapper.  
My questions are

1. After how much duration the map gets updated with new values ?
2. Do i need to add latitude , longitude and hdop in payload format if i am using Android application for ttn mapper?
3. I checked in advanced map options for the specific device and i see only one value , After how much duration does this parameter gets updated?

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**Author:** ![BoRRoZ](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/borroz/32/44234_2.png) [@BoRRoZ](https://www.thethingsnetwork.org/forum/u/BoRRoZ)\
**Post date:** [May 13, 2019, 11:35am UTC](https://www.thethingsnetwork.org/forum/t/queries-about-ttn-mapper/25970/2 "2019-05-13T11:35:05Z")

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see [https://www.thethingsnetwork.org/docs/applications/ttnmapper/](https://www.thethingsnetwork.org/docs/applications/ttnmapper/)

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**Author:** ![interravikram](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/interravikram/32/38445_2.png) [@interravikram](https://www.thethingsnetwork.org/forum/u/interravikram)\
**Post date:** [May 14, 2019, 4:40am UTC](https://www.thethingsnetwork.org/forum/t/queries-about-ttn-mapper/25970/3 "2019-05-14T04:40:00Z")

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I have followed this , but still i can’t see the data points in “advanced map options” except one from 13th May,2019 , 07:44 GMT.

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<div class="post-metadata">

**Author:** ![interravikram](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/interravikram/32/38445_2.png) [@interravikram](https://www.thethingsnetwork.org/forum/u/interravikram)\
**Post date:** [May 14, 2019, 11:05am UTC](https://www.thethingsnetwork.org/forum/t/queries-about-ttn-mapper/25970/4 "2019-05-14T11:05:18Z")

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> **[ttnmapper-201905140709.log](https://docs.google.com/document/d/1Jc-j14jQ5Clj3zxf5z5kIFTOpMyFqyNi994eRD8i6Vg/edit?usp=sharing)**
>
> {"app\_id":"test\_data","counter":142,"dev\_id":"pcb\_test\_data","hardware\_serial":"0004A30B00241830","iid":"2c8de625-3846-46e2-8b16-f2140d6605bd","metadata":{"airtime":51456000,"coding\_rate":"4/5","data\_rate":"SF7BW125","frequency":868.1,"gateways":\[{"a...

This is the data logs from the android application.  
But i can’t see a single data point being plotted

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**Author:** ![system](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/6/2/6250ea44fd2b0d6259489e1a92748df681e1f970.png) [@system](https://www.thethingsnetwork.org/forum/u/system)\
**Post date:** [July 13, 2019, 11:05am UTC](https://www.thethingsnetwork.org/forum/t/queries-about-ttn-mapper/25970/5 "2019-07-13T11:05:19Z")

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