[Qgis-user] authomatic georeferencing or positioning of a feature

[Philip Barlow]

Hi Mary,

If you use the ‘import geotagged photos’ processing tool, yes. It will create a point from the GPS coordinates in the image header. How accurate it will be will be dependent on your device and how good the GPS signal was.

Phil

From: Qgis-user <qgis-user-bounces at lists.osgeo.org> On Behalf Of Mary Neale
Sent: 12 April 2021 08:58
To: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] authomatic georeferencing or positioning of a feature

Hi there

If I were to Take a photo on a mobile phone with geolocation turned on, could I then upload the data into Qgis to accurately plot it?

Many thanks Mary

On 11/04/2021 19:36, Bernd Vogelgesang wrote:

Hi Paddy,

you have to understand the concept, that attributes of a feature have noting to do with its geometry.

The attributes table can hold any kind of information, in case of point layer of course its coordinates as well, but those values will not change when you change the geometry nor vice versa They are simply some numbers filled into that table.

So you could e.g. drag the wrong positioned points to their correct locations (node tool) and then fill in the coordinates via the field calculator ($y and $x, see the documentation), but this is more or less only "cosmetic" as this information is in most cases not really helpfull.

In case of towns, there is actually no such thing as a "correct" coordinate of a representing point, or it is at least pseudo-correct.

Cheers,

Bernd


On 11.04.21 19:28, Pat Brown wrote:

Hi

    I am having a problem with changing co-ordinate in my attribute table.

I am using QGIS 3.18 on WIN 97,so far without any issues.

   It is a point layer with towns and their co-ordinates. Three of these

data points had empty co-ordinate records and they displayed way out of

position. This was already a mystery as I couldn't figure out how it could

display without these. I then filled in the correct co-ordinates but the

points are still displaying incorrectly.

   Then I noticed that on the "identify feature" panel there is a subunit

called (Derived) and it says (clicked coordinate X and Y). How do I edit

this or get rid of this?



Many thanks,



Paddy





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