[Qgis-user] Creating Geometries for tabular data
Mats Elfström
mats.elfstrom at gmail.com
Sun Nov 15 15:49:36 PST 2015
Hi!
Martin is right. This is a piece of cake in MapInfo and a very useful work
flow. The suggested method requires that you look up the object in the
table and then copy its uid to the created object. This is an unefficient
method.
I have recently struggled to do the same in ArcGIS which proved to be just
as inadequate as QGIS in this respect.
MapInfo can create a spatial table without geometries, that is the
difference.
Hälsning / Regards
Mats.E
Skickat från min / Sent from my iPhone, Ursäkta att jag är kortfattad /
Excuse my brevity.
16 nov 2015 kl. 00:36 skrev Randal Hale <rjhale at northrivergeographic.com>:
Probably the easiest way to do this would be a join - so if you made me do
this I would do:
1. Create a layer (say a shapefile) with a point and a unique ID.
2. Make sure that Unique ID is reflected in your tabular data (point 1 has
a corresponding '1' in the tabular data or a point of "Water Park" has a
"Water Park" in your table)
3. Right click on your shapefile with the points (or polygons) and go to
properties -> Joins. Pick your two fields that are the same - and join
them.
After a successful join right click and "save as" and make a new
shapefile/Spatialite layer with all of your attributes.
Randy
--------------------------------------------
Randal Hale
North River Geographic Systems, Inchttp://www.northrivergeographic.com
423.653.3611 rjhale at northrivergeographic.com
twitter:rjhale
http://about.me/rjhalehttp://www.northrivergeographic.com/introduction-to-quantum-gis
On 11/15/2015 06:22 PM, Martin Bain wrote:
Hi,
I’m after your suggestions for the best work flow for adding spatial data
to existing tabular data.
Say we have a tabular list of playground equipment – I want to associate a
point object with each row in the list – so I end up with spatial and
attribute data in the one table.
I used to do this in MapInfo, you could open a table of purely tabular
data, select a row in the attribute table, adding a point in the map window
would create a map object for the selected row (rather than adding a whole
new row to the table). I don’t think I can do it like that with QGIS – am
I right in thinking if there is no geometry for a row it will be excluded
from the attribute table?
How do people do this in QGIS?
Thanks,
Martin.
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