Those two fields are present in the vector layer properties. It
was possible to set a minScale bigger than the maxScale.
Now, the maxScale is forced to minScale if the user tries to
set it to a lower value.
ton of available area units (eg m2, km2, mi2, ft2, yd2, ha, ac,
etc)
Adds a new option in both the QGIS setting and project properties to
set the units used for area measurements. Just like the distance
setting, this defaults to the units set in QGIS options, but can
then be overridden for specific projects.
The setting is respected for area calculations in:
- Attribute table field update bar
- Field calculator calculations
- Identify tool derived length and perimeter values
Also adds unit tests to ensure that area calculated by attribute table
update bar, field calculator and identify tool are consistent wrt
ellipsoidal calculations and area units.
TODO: make measure tool respect area setting
(refs #13209, #4252 and fixes#12939, #2402, #4857)
Adds a new option in project properties to set the units used for
distance measurements. This setting defaults to the units set in
QGIS options, but can then be overridden for specific projects.
The setting is respected for length and perimeter calculations in:
- Attribute table field update bar
- Field calculator calculations
- Identify tool derived length and perimeter values
- Default unit shown in measure dialog
Also adds unit tests to ensure that length and perimeter calculated
by attribute table update bar, field calculator and identify tool
are consistent wrt ellipsoidal calculations and distance units.
(refs #13209, #12939, #2402, #4857, #4252)
copy/= operators or making them private
This revealed (and fixes) some issues, including a potential crash
using server access control (refs #13919), and a potential crash with
diagrams
* Move height and angle expressions for 2.5D renderer to layer
* Apply color based on main symbol color
This makes the transition to other renderers easy.
Fixes#14132
This adds a configuration interface and renderer that makes it easy to
put all the pieces together which are required to get a 2.5D effect.
It allow for configuring some of the styling and is meant to create an
easy-to-use setup.
Since every part of the system is built around QGIS' internal rendering
and symbology engine, there is much to fine tune. To get all the
possibilities, just change the renderer to a graduated, categorized or
single symbol renderer upon creation and you will find full access to
improve the style to your needs.
Funded by
* Regional Council of Picardy
* ADUGA
* Ville de Nyon
* Wetu GIT cc
[FEATURE] Tracing of features (digitizing)
Tracing can be now used in various capturing map tools (add feature, add part, ...) including reshape and split tools.
Tracing is simply a new mode for these tools - when tracing is not enabled, the tools work as usual. When tracing is enabled (by clicking the new magnet icon or pressing T key), tools switch to tracing behavior:
- first click on a vertex/edge (must be snapped!) will start tracing - moving mouse on top of the map continuously updates the trace
- next click will confirm the trace and mark start of a new trace Tracing can be enabled/disabled anytime even while digitizing one feature, so it is possible to digitize some parts of the feature with tracing enabled and other parts with tracing disabled.
Tracing respects snapping configuration for the list of traceable layers.
If there are too many features in map display, tracing is disabled to avoid potentially long tracing structure preparation and large memory overhead. After zooming in or disabling some layers the tracing is enabled again.
Internally, things work like this:
- when tracing is requested, linestrings are extracted from vector layers, then noded (using GEOSNode to resolve all intersections) and finally a simple planar graph is built (vertices + edges)
- when tracing, endpoints are temporarily added to the graph (if not equal to one of existing vertices already) and Dijkstra's algorithm is run to get shortest path
Original specs for the curious ones (the interaction with QGIS is slightly improved from what has been specified): http://www.lutraconsulting.co.uk/crowdfunding/autotrace-phase-2/specification.pdf
