[Qgis-user] Map Corner Coordinates

[Richard McDonnell]

Hi Alanna,
In addition to Andreas message…
If a table with the extents (Lower Left and Upper Right) is what you are looking for then something similar to the below is an option..

[cid:image001.png at 01DA8F36.C6979600]

You could also, conceivably, use the expressions in text boxes.
Hope that helps,

Richard



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From: QGIS-User <qgis-user-bounces at lists.osgeo.org> On Behalf Of Andreas Neumann via QGIS-User
Sent: 15 April 2024 12:58
To: Alanna Mitchell <A.Mitchell at aquafact.ie>
Cc: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Map Corner Coordinates


Hi Alanna,

It depends a bit on what you want to do.

There are map grids that you can use to label the edges of a map.

Or you can use a label with an expression. Here is one expression to help you get started:

with_variable(
    'mapextent',
    map_get(item_variables('Map1'),'map_extent'),
    round(x_min(@mapextent)) || ' - ' || round(x_max(@mapextent))
)

This gets the map extent of the map with the ID "Map1" (you need to set the ID accordingly). Using the item_variables() data structure you can get hold of the first map and then query one or more of the attributes of a referenced item in a layout.

https://docs.qgis.org/3.34/en/docs/user_manual/expressions/functions_list.html#variables gives you a list of available variables - but it depends of the expression scope you are currently in.

Hope this helps you to get started.

Andreas

On 2024-04-15 12:13, Alanna Mitchell via QGIS-User wrote:
Dear QGIS community,

I am attempting to get the coordinate intersects of my map corners to display in Print Layout/Composer (i.e., N and W coordinates). The exact directions were: 'For geo-referencing purposes labelled coordinate intersects should be shown in all four corners of the map'. There does not seem to be an option for this in QGIS (I have found a few in ARC). I have found dynamic text in the Print Layout (Add Items - Add Dynamic Text - Map Properties) and one can see X minimum, X maximum, Y etc. I am not sure what these are or if they are relevant to me finding the map corner coordinates.

I also found the plugin Map Corner coordinates. But this seems to only work for the main map viewer, and I can't get this to align exactly with my Print Layout to ensure these coordinates are exactly the same.
If there was even a mathematically method, I would be more than partial to using that even. I appreciate any and all help in these matters. Thank you in advance.

Kind Regards,
Alanna

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