Line grips?

[PeteUK]

Normally when drawing a basic line and then select it, it has three grips - one at each endpoint and one on the midpoint.

 

However whilst drawing ontop of an ordinance survey layout when I draw a line, it only has one grip at one of the end points instead of the three as above.

 

Is this a setting I can turn off? I've also copied an area into a new drawing but still only get one grip.

 

Another interesting thing is if I draw a line next to the existing lines, it has three grips, but the moment I snap to an existing line it suddenly changes to one grip...

 

Help!

[hotrodz0321]

can you post a screen shot of it?

[PeteUK]

The line beside A has just been drawn free.

The line beside B has been snapped to two endpoints of the ordinance survey drawing and suddenly lost two of the grips.

[eldon]

Ordnance Survey use polylines a lot, which does away with a middle grip in a line. Why don't you do a list on that line and see what it is?

[hotrodz0321]

type LIST and select that line....are any of the coordinates really far from 0,0?

 

i'd be willing to bet that you are working really far from 0,0......if you moved closer to 0,0 i think the problem would solve itself

[eldon]

i'd be willing to bet that you are working really far from 0,0......if you moved closer to 0,0 i think the problem would solve itself

 

The trouble is that if you moved to 0,0 coordinate, all you would see is sea, and there is not any detail to be shown there until you get on land

 

The Ordnance Survey set up the origin (0,0) at Latitude 49° 46'N, Longitude 7° 33'W, and it is to the South-West of the Isles of Scilly.

[hotrodz0321]

Normally when drawing a basic line and then select it, it has three grips - one at each endpoint and one on the midpoint.

 

However whilst drawing ontop of an ordinance survey layout when I draw a line, it only has one grip at one of the end points instead of the three as above.

 

Is this a setting I can turn off? I've also copied an area into a new drawing but still only get one grip.

 

Another interesting thing is if I draw a line next to the existing lines, it has three grips, but the moment I snap to an existing line it suddenly changes to one grip...

 

Help!

 

 

PeteUK, any solution yet? if so post it so I dont lose sleep tonight because I couldnt figure something out.

 

In all my digging, I've only found this problem to be associated with being a great distance from origin

[eldon]

Hotrodz0321, I know that Ordnance Survey is outside your area, so you wouldn't know, but you might like to see this Google image which shows where the (0,0) coordinate is.

 

I thought that it was complicated hatch patterns that got grouchy when they were a long way from 0,0

[hotrodz0321]

hatch patterns act up like that too...but you can reset the hatch patterns origin without affecting its coordinates....

 

is there a way to keep everything where it is (and not affect the coordinates) and move the origin closer?

[hotrodz0321]

check this out.....same problem...only they can actually move the entities closer and solve the problem.

 

http://discussion.autodesk.com/forums/thread.jspa?messageID=4311086

[PeteUK]

Thanks for the help.

 

Having read through this and the linked post, I think its possibly down to the fact that I am 891798183.4mm away from 0,0!

 

Reason being because I am working on several OS plans and to select certain co-ordinates, I have to run the drawing from an OS grid.

 

However until now I've not had this problem, other parts of the drawing have always had three grips per line...

 

On a seperate note, would the OS UK grid differ from the World Wide OS grid? As my origin point at 0,0 doesn't look like it would be to the south west of the Isles of Scilly as mentioned above. More like it would be at the most south west point of the UK.

 

EDIT : Just read eldon's post properly. Anyone know why the 0,0 point is set where it is?

[eldon]

First of all, what result did you have from Listing the object.

 

Secondly, on a historical note, Ordnance Survey is the mapping of the UK only. The rest of the world have to put up with the UTM zones, unless they have their own local sytem. The zero point was set there because then all Eastings and all Northings would be positive

 

One way that you could work nearer to the (0,0) point would be to work in metre units, then all your coordinates are divided by one thousand.

[PeteUK]

The line lists like any other line - nothing out the ordinary.

 

Thanks for that eldon - I'd have thought they would have kept Ireland within that theory though, potential 'expansion' and all that!