refining objects
Added by Friedrich Volkmann over 2 years ago
With more and better arial images becoming avaiilable for OSM, it is quite a standard job for mappers to refine objects such as roads, forests, and buildings. E.g. there's a road currently mapped with 100 nodes, whose positions are inaccurate. A mapper may wish to adjust those nodes, and to add 100 more nodes for smoother and more detailed mapping of curves.
In Merkaartor 0.16, this could all be done in move mode. Nodes could be created via virtual nodes. In 0.17, I see no virtual nodes any more. It seems that they are gone, although the option in the preferences still exists. It is now possible to make a node by double clicking in select mode. But who wants to switch between move and select mode hundreds of times?
Searching for an alternative, I found out that moving is also possible in node mode. (This had aleady been a feature of 0.16, but I didn't know.) I find this even better than the virtual node approach. I just wonder why the moving nodes in node mode always snap to a wide-meshed, invisible grid? For fine-grained placement, that makes me need to zoom in, which increases traffic and server load by reloading the background image.
Replies (2)
RE: refining objects
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Added by Chris Browet over 2 years ago
Friedrich Volkmann wrote:
In Merkaartor 0.16, this could all be done in move mode. Nodes could be created via virtual nodes. In 0.17, I see no virtual nodes any more. It seems that they are gone, although the option in the preferences still exists. It is now possible to make a node by double clicking in select mode. But who wants to switch between move and select mode hundreds of times?
1) Virtual Nodes are still there. Haven't you disabled their display in the "show" menu? You already have found out that they can be enabled/disabled via the properties.
2) In Properties, disabling "Separate move mode" allows you to move stuff in select mode. In this mode, you can only move selected items.
Searching for an alternative, I found out that moving is also possible in node mode. (This had aleady been a feature of 0.16, but I didn't know.) I find this even better than the virtual node approach. I just wonder why the moving nodes in node mode always snap to a wide-meshed, invisible grid? For fine-grained placement, that makes me need to zoom in, which increases traffic and server load by reloading the background image.
This has already been noticed. This is due to the fact that moving is done based upon geo coordinates (rather than display X/Y). This has the side effect that multiple display X/Y values are equivalent to the same coordinates (especially at low zoom levels), thus the "snapping effect".
You can create a "Feature" ticket to remind me to have a look to see if something can be done.
- Chris -
RE: refining objects
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Added by Friedrich Volkmann over 2 years ago
Indeed, I overlooked that virtual nodes need to be enabled in the "show" menu too.
Moving based on display x/y would be great, nonetheless.
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