topic Re: coordinates overlay in Civil 3D Forum

coordinates overlay

Anonymous — Wed, 20 Apr 2016 22:29:02 GMT

i would be greatful if tehre is someone who knows this :

I have to overlay anOSI tiles ( in different coordinates) on to a current foothpath survey in ItM coordinates ,

When I coppy and paste both fragments end up in a different part of the screen .

Please advise Do I need to change the coordinates of the OsI tiles and can you do it on a file that has already its own system assigned ?

thatnk you

Re: coordinates overlay

Civil3DReminders_com — Thu, 21 Apr 2016 06:26:16 GMT

You want to assign the correct coordinate system to the drawing(s). Then use MapIImport to bring in the image. It should then put the images in the correct locations, although you may need to modify the units.

Re: coordinates overlay

Pointdump — Thu, 21 Apr 2016 07:40:19 GMT

Trish,

Welcome to the Forum.

What are OSI tiles and what coordinate system are they in? What coordinate system is your drawing in? Can you post both data and drawing?

Dave

Re: coordinates overlay

Anonymous — Thu, 21 Apr 2016 08:37:56 GMT

Dear Advisor:

thank you for your answer

I operate two systems . One is The Autocad LT 2016 full verion the sencond one is Autocad Map 2017 30 dya trial .

Iwhen I ope th eOSI tiles in Map 17 this is what I haVE (Ithink thi is World coordinate assigned to it ) : file 1

So I assign new coordinates : following the steps in menue Map Drafting > Coordinate system > library >then I search for ITM (irish Time) and assign

but it does not really change anythhing when I coppy and paste the footpath survey from anither file opened : what happens is this: Photo 4

Re: coordinates overlay

Pointdump — Thu, 21 Apr 2016 09:15:41 GMT

Trish,

I'm still unclear on what an OSI Tile is. Aerial photo?

Try this. I've attached a Shapefile to a drawing in the ITM Coordinate System. Take your OSI Tile Files and Drag-n-Drop them onto this drawing. Do they come in at the right place? Images can be tricky sometimes.

Dave

Re: coordinates overlay

Anonymous — Thu, 21 Apr 2016 10:17:50 GMT

its a strugle

I drag and drop but it is aksin me :

Enter x scale enter y scale

and specify the angle of rotation

Attached osi tile example

Re: coordinates overlay

Anonymous — Thu, 21 Apr 2016 10:51:50 GMT

the attached is what I get as a result when I try to do what you said

Re: coordinates overlay

Anonymous — Thu, 21 Apr 2016 11:04:45 GMT

thank you

but it seems like my files with OSI tiles are not a right format for them map import .

Re: coordinates overlay

Pointdump — Thu, 21 Apr 2016 13:08:15 GMT

Trish,

You won't be able to use GIS data with AutoCAD LT. Use your Map 2017 Trial to bring those tiles into your drawing.

So these OSI tiles, did you get them from here?
http://www.osi.ie/products/professional-mapping/height-data/

Please post a link to the tiles so we can figure out how to get them into your drawing.

Dave

Re: coordinates overlay

Anonymous — Thu, 21 Apr 2016 13:32:29 GMT

Hi Dave

yes that is the place the 3rd company got it from for me .

I have posted the file with the OSI tile here it is again :

any help would be apriciated really :):)

I am using the Map one , yes I agree

Thank you

Re: coordinates overlay

Pointdump — Thu, 21 Apr 2016 14:15:09 GMT

Trish,

Yes, I got your drawing, but what is needed now is the data. The problem is that your drawing has no assigned Coordinate System and it's units are in Feet.

The ITM Coordinate System is in Meters, so your data did not come in right in your drawing. Those beautiful Metric Tiles were converted to barbaric International Feet. So if you scale everything in your drawing up by 3.28083989501 then you can assign the ITM Coordinate System to your drawing and all should be good. But the best way would be to get the original data and bring it in to a drawing that is already assigned the ITM Coordinate System.

Dave

Re: coordinates overlay

Pointdump — Fri, 22 Apr 2016 00:06:05 GMT

Trish,

From the Ordnance Survey Ireland site I found this list of Control Points, giving coordinates in both ITM and Irish Grid Systems:
http://www.osi.ie/wp-content/uploads/2016/02/GPS-STN-COORDS_11-11-2015.pdf

The coordinates in your drawing of OSI Tiles looked like Irish Grid Meters, so I converted and placed them in a drawing with an assigned ITM Coordinate System. You'll want to open it with your Trial Version of Map. I don't have AutoCAD LT to test whether it can be opened with LT.

Dave

Re: coordinates overlay

Anonymous — Mon, 25 Apr 2016 13:30:51 GMT

I really apriciate your message

I am trying to do it on the tiles I have left but really strugling .

Please send me step by step my email is :

trish.kwasniak@gmail.com

I would be greatfull .

what I do is scale with ITM coordinates by the number you gave me and then save an dthen paste ..whjat else do I need to do

Re: coordinates overlay

AllenJessup — Mon, 25 Apr 2016 14:05:53 GMT

See if THIS helps.

Re: coordinates overlay

Anonymous — Mon, 25 Apr 2016 14:39:57 GMT

ok now my autocad does not want to coppy an object ...(

Re: coordinates overlay

Pointdump — Mon, 25 Apr 2016 15:12:37 GMT

Trish,

OK, here's a step-by-step. Your T50 tiles 11092015.dwg just needs two changes to make it useful. Change Feet to Meters and Assign Irish Grid Coordinate System. Thusly:

Save that drawing and close it. Open a brand spanking new Metric drawing and switch to the Map Workspace (MAPWSPACE). MAPCSASSIGN the ITM Coordinate System. If your Map Task Pane isn't open, turn it on (View Tab >> Palettes on the Ribbon). In the Task Pane, on the Map Explorer Tab, expand Current Drawing and Right-Click Drawings and select Attach. Choose the drawing you saved and closed. Back to the Map Explorer Tab, under Query Library, Right-Click Current Query and select Define. In the Define Query Dialogue Box that comes up Select Location >> All >> OK. Back in the Define Query Dialogue Box, under Query Mode, select Draw and click Execute Query. Your original drawing has now been correctly transformed into the ITM Coordinate System.

There's a lot to do here, so let me know if these steps need more explaining.

Dave

Re: coordinates overlay

Pointdump — Mon, 25 Apr 2016 16:27:01 GMT

Allen,

That link is gold. I've alway had trouble with MAPIINSERT'ing images, and I can't wait to try this out.

I haven't yet figured out what Trish's data is exactly or where she got it on the OSI website. Knowing a little about the original data would be a help.

Dave

Re: coordinates overlay

Anonymous — Tue, 26 Apr 2016 12:10:02 GMT

hi Dave

I do not have settings on the Task Pane I wonder how to open it up plese see attached

so the tiles still end up being added to the map file and land in a different coords

Re: coordinates overlay

AllenJessup — Tue, 26 Apr 2016 12:15:22 GMT

Hi Trish,

You've ended up in the Civil 3d forum not the Map 3d one. So some of the things shown may not fully apply to your version of Map. Dave gave you the commandline equivalent for Map, MAPCSASSIGN. You can use that to assign the coordinate system to your drawing.

Allen

Re: coordinates overlay

Anonymous — Tue, 26 Apr 2016 12:58:08 GMT

I need to assign the meeters I am ok with coordinates it is pretty straight forward

Dave has got the same version ?? What is the autocad that you use Dave ?

I do not mean to make this streach just trying to apply the rules . It is not easy when you get lost in it

Pat