Two Types of Weeding give different results

Been playing around with weeding polyline contours to get my drawing file size down and have found that the mapclean –> weeding command gives different results to the featureline weeding command, not sure why at this stage but with the same settings the map weeding only removes about one third of the vertices that the featureline weed does. But the featureline weeding is very slow in processing a large number of polylines in one hit where as map is a lot quicker.

Adding Scale and other Fields to Title Block

Been updating the old title block to be a bit more automatic to save sometime I insert fields into the block attributes to give me the data I wanted as follows

Insert Copyright Year

Insert Drawing Name 

Inserting blanks as per link

Inserted Drawing Scale as per this video

Updated the scale bar values to update based on the scale as well

 

I did look at using a diesel expression first for the scale calculation but this did not work as the object ID is turned to a number straight away and the link to the viewport is broken here are some links on diesel for future reference anyway

http://civil3d.wordpress.com/2011/08/23/quick-to-the-diesel/

http://docs.autodesk.com/ACD/2010/ENU/AutoCAD%202010%20User%20Documentation/index.html?url=WS73099cc142f4875513fb5cd10c4aa30d6b-7b3c.htm,topicNumber=d0e393837

http://www.cadforum.cz/cadforum_en/qaID.asp?tip=3676

Creating Surfaces from LINZ NZTopo50 maps

In rural New Zealand there is generally a lack of Lidar information to build 3d surfaces within Civil3d. However Land Information New Zealand (LINZ) have made available on their website shp file versions of their NZTopo50 series maps that contains contour information at 20m intervals. You can use these contours to create surfaces and define catchments automatically in Civil3d.

To build a surface is Civil3d:-
1. Goto the LINZ website and choose a map of your area of interest
http://www.linz.govt.nz/topography/topo-maps/map-chooser
at the bottom of the particular map you will see the shp file download option. Download and unzip the shp files.

2.  Now you have to import the shp data into a new drawing using MAP and assign the object data elevation to the Z value of the polylines that represent the contour lines. There are a couple of tutorials on the web how to do this already here and here.
Note the shp files downloaded are in NZTM co-ordinate system so you may have to do a co-ordinate transformation on import as well.

3. Now that you have the contours with the correct elevation you can build a surface in Civil 3d in the normal way and define catchments and flow paths using the built in Civil3d’s tools.