topic Re: Inserting cross-sections in GeoRAS in Water Resources Questions

Inserting cross-sections in GeoRAS

TimHaeusler — Wed, 13 Jul 2011 00:26:39 GMT

Hi,

I have a GeoRas/HecRas model set up. I want to insert additional cross-sections in between existing ones. I tried to add additional cross sections in my cutline layer but when I try to attribute them using GeoRAS it always stops at the last of the old XS rather than continue to the new xs which are added at the end of the attribute table. Is there a way of getting GeoRAS to look at all the lines in the attribute table, or reorder each line in the attribute table so all cross sections are in order going downstream perhaps using the streamline layer. Thought this would be a common thing to do but have searched forums to get answers but came up with nothing. Maybe i am missing something fairly basic.

Thanks
Tim

Re: Inserting cross-sections in GeoRAS

MattMead — Wed, 13 Jul 2011 13:17:02 GMT

Tim,
Georas is pretty well known to do some really odd,and painfully annoying, things completely at random.

I'd suggest exporting all your shapfiles(right click->data->export data) and create a new mxd. You can then just copy the polylines from each of your exported shapefiles into the correct new GeoRAS setup. Somewhat time consuming, but it should solve your issue. I wouldnt recommend just importing directly from your old georas files as it sounds like something is corrupted.

Hope that works

Re: Inserting cross-sections in GeoRAS

TimHaeusler — Thu, 14 Jul 2011 00:59:23 GMT

Matt,

Thanks for your reply. As suggested I exported the cutline file to a new one. Then I tried setting all the attribute data to "null" using the field calculator. I ran the GeoRAS process for attributing Station, Banks, lengths and heights etc. and all seemed to work OK this time, it went past the previous xs that were in order to include the new ones added at the end. Not sure if it was exporting to a new file or clearing all the previous attribute data, but luckily I did not have to resort to recreating the mxd or have to draw my 1500 cross sections again.

I agree that GeoRAS does have some odd and annoying quirks!
Thanks again for your assistance
Tim