SubscribeLarge Data sets - speed up Tiled Raster files with WMS...
With aerial photos or scanned maps, it is common to have a large number of tiled images. Using FDO’s to bring the images is in a great way to improve speed but when we are talking about many images, it can still have issues. One of these is the fact that even though FDO’s are a serious improvement over the old fashioned insert image function, it will still slow the AutoCAD Civil 3D session down, particularly for panning/zooming - another is that every time the DWG file is opened, all the images have to be resolved regardless of whether they are displayed or not - for a large area (a State in Australia for example), this can take a long long time. I know people who go for a coffee while the system is sorting itself out.
In this example, each square on the grid represents a 50MB image. We don’t want all this images on the screen at the same time but we do want to be able to zoom into an area and have them appear for just this region without too much fuss.
This solution is not simple - we use Mapguide to do the work externally to the Civil 3D session. It is well worth the effort though - the improvement in speed is amazing.
REFERENCE PLANES 002
...a practical example (part2) - the finishing steps...
We’ve got the planes positioned and the profiles extracted… all we have to now is
- create the design profile and
- build the finished corridor.
This is a follow on from previous posts:
“Widen at Grade.. the concept”
“ref planes 002 a practical example (part 1)”
ARD/EZY + Corridors - (how to create the corridor)
(a follow on from this post)
This has become topical recently as there have been questions on exporting ARD models to Trimble and Leica instruments for setout. (LandXML is an option but its cool to take the corridor)
Creating the corridor from ARD is a one click operation - there are 2 minor setups to do first.
We’re assuming the network is all modeled up in ARD so we’re just going to look at the steps to generate a full corridor object.
COGO functionality in Civil 3D - Interpolate Points...
I’ve just come from a conference where I was reminded of a Survey Feature that we often forget to show off in presentations - the functionality and options available in Civil 3D to create Points manually.
The scenario is that an intersection has been surveyed and the point where the 2 CL’s meet has not been picked up. The solution is to interpolate the Point from the Main road and join it to the Side Road (the dashed blue line above) so the triangulation forms properly.
This is just one of the options available in the Points > Create Points toolbar. Once you know the general gist of one of them…
REFERENCE PLANES 002
...a practical example (part1)
One of the most common reconstruction jobs being done for Road Authorities these days is adding bus turning lanes to existing intersections.
The goal is to minimise the work on the existing roads by grading the new string to preserve and extend the existing road crossfall where possible. The challenge is to control the drainage around the new kerb - its a perfect example of reference planes in action.
This is a follow on from a previous post on the topic “Widen at Grade.. the concept”
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