RE: MI Copying Boundary Lines.
Or the other one is a digitising trick but as effective (sometimes) switch the node snapping on - (hit s), select the polygon tool then move the cursor over the first point you want to digitise from, get the snapping cross hairs to appear and click to create a new node. then move to the last point on the existing polygon you want to digitise to and again move the cursor over the point so that the snapping 'cross haris' appear - then hold down shift whilst clicking. the boundary of the new oject will automatically 'snap' along the entire lenght of the new object between the 'start' and 'end' nodes. i find it better to do this is in a couple of stages than all at once. Jonathan -Original Message- From: Martin Roundill [mailto:[EMAIL PROTECTED]] Sent: 07 April 2000 06:35 To: '[EMAIL PROTECTED]'; [EMAIL PROTECTED] Subject: RE: MI Copying Boundary Lines. Hi Myles I find the easiest way to do this is in fact not to digitise it. Instead digitise a polygon that goes inside the original polygon, set the target to the new polygon, select the existing polygon(s) and use these to erase the overlap. The result is that the new polygon exactly agrees with the existing polygons. (Either that or you get the dreaded "error overlaying objects" message which indicates that the original data isn't as clean as you thought) simply and stacks quicker than digitising all the little bits. Cheers Martin == Martin Roundill GIS Manager Waitakere City Council Private Bag 93109 Henderson Waitakere City New Zealand -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, 7 April 2000 11:56 To: [EMAIL PROTECTED] Subject: MI Copying Boundary Lines. I have a mapinfo table of which contains very detailed regions. When I say detailed I mean the bounday lines are made up of hundreds of points over a short distance. What is the best way of copying a piece of this regions boundary so that when I digitise another region adjacent to it, they have identical boundaries? Any help would be much appreciated. Thanks in advance Myles -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI Copying Boundary Lines.
Hi Myles I find the easiest way to do this is in fact not to digitise it. Instead digitise a polygon that goes inside the original polygon, set the target to the new polygon, select the existing polygon(s) and use these to erase the overlap. The result is that the new polygon exactly agrees with the existing polygons. (Either that or you get the dreaded "error overlaying objects" message which indicates that the original data isn't as clean as you thought) simply and stacks quicker than digitising all the little bits. Cheers Martin == Martin Roundill GIS Manager Waitakere City Council Private Bag 93109 Henderson Waitakere City New Zealand -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, 7 April 2000 11:56 To: [EMAIL PROTECTED] Subject: MI Copying Boundary Lines. I have a mapinfo table of which contains very detailed regions. When I say detailed I mean the bounday lines are made up of hundreds of points over a short distance. What is the best way of copying a piece of this regions boundary so that when I digitise another region adjacent to it, they have identical boundaries? Any help would be much appreciated. Thanks in advance Myles -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
Re: MI Copying Boundary Lines
Myles Martin, There are two answers here; You can draw your new region extending over the original, then Objects Set Target, Objects Erase Or (and this is particularly useful if you are using polylines rather than regions); - set snap on (toggle the "s" key) - drawing your region( or polyline) lock onto the first vertex, then, holding down the "shift" key, move along the existing region-boundary, your new region-boundary will be drawn along the same route as the old one. -Try pressing the "ctrl" key rather than the "shift" key, and the new region-boundary will be drawn round the existing region in the other direction. Hope this helps, Brian Forrester Wood Mackenzie [EMAIL PROTECTED] Your Message: " I have a mapinfo table of which contains very detailed regions. When I say detailed I mean the bounday lines are made up of hundreds of points over a short distance. What is the best way of copying a piece of this region's boundary so that when I digitise another region adjacent to it, they have identical boundaries? " -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
Re: MI Copying Boundary Lines.
Hi All! When digitizing adjacent features, use the tracing ability of MapInfo. Here's how to trace the nodes of an existing polyline or polygon: 1. Press the S key to activate Snap Mode. 2. Click on a node of the polyline/polygon you want to trace. 3. Move the mouse to another node of the same object. Polyline: hold down the Shift key or the Ctrl key and click. Polygon: hold down the Shift key for the shorter set of nodes or the Ctrl key for the longer set of nodes and click. Pressing the Shift or Control keys highlights the trace path. Click to automatically trace the segments between the nodes and add them to the polyline/polygon you are drawing. Note: you can only trace one object at a time. There must be nodes where you want to start and end the tracing, so you must consider adding nodes if a perfect fit is necessary. Hope this helps Mats.E -- ::: :Email/ [EMAIL PROTECTED] ICQ#9517386 : :-: :Mail/ GISKRAFT, Mats Elfstroem, Vaepplingv 21, SE-227 38 LUND, SWEDEN: :Phones: +46 46 145959, +46 70 595 3935 : ::: -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
MI Copying Boundary Lines.
I have a mapinfo table of which contains very detailed regions. When I say detailed I mean the bounday lines are made up of hundreds of points over a short distance. What is the best way of copying a piece of this regions boundary so that when I digitise another region adjacent to it, they have identical boundaries? Any help would be much appreciated. Thanks in advance Myles -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
