Is there a way to improve the accuracy of smartphone GPS?

It is the start of an experiment that tries to add the GEO tag of the photograph accurately.
With the smartphone GPS I have, the error can be as small as 3m when the conditions are good, but it is difficult to reduce it further.
Therefore, the location information given to photos taken at intervals of several meters is not perfectly aligned.

I tried to bring my smartphone higher than my head in order to improve the satellite capture, but there was not much difference compared to using a smartphone in front of my chest.

Is there any way to improve accuracy?

My equipment is :
Smartphone: Pixel 3
Camera: THETA Z1

写真のGEOタグを正確に付与しようとする実験の開始です。
私が持っているスマホのGPSでは、条件が良いときには誤差を3m程度まで小さく出来ますが、それ以上小さくすることは難しいです。
ですので、数メートル間隔で撮影した写真に付与される位置情報はきれいには揃いません。
衛星の捕捉状態を改善する目的で、スマホを頭より高い位置で持ってみたのですが、胸の前で持ったスマホを使用した時と比べてもあまり差はありませんでした。
もっと精度を高める方法はないでしょうか?

私の機材は、
スマホ : Pixel 3
カメラ : THETA Z1
です。

スマホを頭上に掲げて撮影しました。


https://goo.gl/maps/vTngdZnbVgqcHZVf9

スマホを胸の前で持って撮影しました。

撮影直前の時点での衛星の捕捉状況は以下の通りでした。

21 Likes

Hello, @potaro67

Trust being a proficient LG you must have tried all the tricks to enhance the accuracy of GPS location on your phone.

That includes calibration of the compass also.

Now the next best solution would be to get an external GPS receiver which can be paired with the phone through the Bluetooth.

I have noted the presence of many such devices on a popular e-commerce site at a quite reasonable price.

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@potaro67 I think you can read more on https://www.gps.gov/systems/gps/performance/accuracy/

8 Likes

Hello @potaro67

sometimes even professional GPS cannot communicate perfectly with the satellite due to the reflections of the radio waves and the blockage produced by certain terrestrial structures, trees, buildings, board fences, plus many others.
Humidity in the atmosphere affects radio waves and ionized particles affect radio waves transmitted by satellites.
About the accuracy of mobile phones at GPS signals I do not discuss, I tell you a real fact
I made a photo sphere with a pixel3 between three nearby hills, google photos was wrong with 500m when setting the coordinates.

In this case the triangulation was wrong due to the reflection of the radio waves from the obstacles in the area

8 Likes

Thanks, @C_T

Thank you for the information of the GPS external receiver.
With only the equipment I am currently using, the positional information error can only be reduced to about 3m. I wish I could reduce the error to about 0.5m.

Thanks, @Ant_Bad_Yogi

Thank you for explaining GPS.
In Japan, where I am, there are quasi-zenith satellite called “MICHIBIKI” besides the GPS satellite.
I want to learn how to use them all well.

Thanks, @To_paul

I have been more interested in the Galati and the Danube than the misfortune of misplaced photos.
The railway network around steel companies and shipyards is attractive. The iron bridge has already been removed in the photo you presented, but it is interesting that the iron bridge still remains in the satellite photo.

I want to walk on this bridge where I can see both the tramway and the maintenance facility for industrial trains.
https://goo.gl/maps/cJUEJYuwiqmrfx1a9

In Japan, the number of roundabout intersection like this has increased recently.
https://goo.gl/maps/yd37LYmW9rBU8vys8
https://www.facebook.com/shotaro.igami/posts/2540612139381589

The 20 photos I took have appeared gradually on Google Maps on the web.
Hopefully, the photo will already have this correct location information at the time of the photo capturing.

https://goo.gl/maps/GVCqxtA7JGswsxxNA

I would also like to hear the experiences of the actual success of receiving location information with high accuracy.
What equipment do you use and what kind of shooting environment do you create?
Did you get the location information correctly even on a cloudy day?
What kind of equipment is good for getting position information correctly even in mountainous valleys?
https://goo.gl/maps/QDfybTsYQ2yL4Jxx7
https://youtu.be/8v-DZPbhAvo
https://youtu.be/TrQs35LqQao

2 Likes

@potaro67 I also heard about MICHIBIKI from a startup competition this year in Japan. It is an interesting satellite.

I found this https://www.phonearena.com/news/Dual-frequency-GNSS-GPS-test-S10-vs-iPhone-OnePlus-Pixel-P30-LG_id116234. I’m using S10e, it doesn’t support dual frequency GPS.

6 Likes

Hello @potaro67

In winter, the iron ore freezes in the freight wagons that came from Russia and Ukraine, and did not go unloaded.
Those long buildings are furnaces for heating freight wagons with iron ore, after the ore was thawed the wagons were unloaded.

A photo taken from the viaduct in the direction of the city.
On the left side below the bridge there is a shepherd with sheep for grazing
It was foggy all day the pictures from the bridge are not successful

Roundabouts are something new implemented in my country

The Danube River, in the distance is the shipyard. I am very glad that you found something interesting in my city
Thank you respectfully

8 Likes