Re: MI Creating points
Another thing you can do change the point to a small circle or square( some other polygon), select both polygons and combine. This allows both objects (or more) to access the same record. Michel Larue wrote: > Dear Gilbert, > > It is because MapInfo can have only one object attached to one record, and > the object is already there, it is your polyon. In fact mixing polygons and > points is not either a good idea, and is even forbidden in Arcview. So I > suggest that you save a copy of your polygon table with another name, open > this table, update your columns with centroidX and centroidY, remove the > polygons and create points. > > Have Fun > > Michel Larue > > At 11:51 14/09/00 -0400, you wrote: > >Could someone help me with the Create points command from the Table menu? > > > >I have a polygon table which is editable, I created 2 new columns in the > >associated browser that I filled with the X and Y coordinates of the > >polygon's centroid. Then I'm using the Create points command to get that > >central point feature for each polygon. I get no error message, but no > >points either. Why this? > > > >_ > > > >Yves Gilbert > >Agent de recherche/Research Officer > > > > > >-- > >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 Creating points
Of course Mi loves mixed bags. The segregation of different object types in different layers cannot be justified by MI capability of handling and displaying them, by far. But I have found 3 reasons to promote segregation. It may have something to do with the non-graphic part of the table: most often, different object types correspond to different realities that are best described by different variables. Forcing every object type to carry exactly the same set of variables may be counter-productive and segregation would be justified. Do not forget that mixed bags will have some constraints on possible treatment based on object information. e.g. updating a column with the area of the objects can be done on sets of closed objects only, if not kaboom. But this can be avoided by updating selections containing only the right objects. Finally, segregation is the only way to control effectively the visibility of overlapping objects (given the fact that MI display order cannot be controlled), but it might not be based on type only; smaller closed objects might be on a higher layer than larger closed objects that would occult them. Jacques PARIS e-mail[EMAIL PROTECTED] For MapInfo support, see the Paris PC Consult enr. site at http://www.total.net/~rparis/gisproducts.htm -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of CDR Group Sent: September 15, 2000 8:25 AM To: [EMAIL PROTECTED]; Michel Larue Subject: Re: MI Creating points Michel I was interested in your comment that mixing polygons and points in the same table is not either a good idea, and is even forbidden in Arcview. A major factor in choosing Mapinfo for us, was that it DOES have the flexibility to store points, lines, polygons and text objects in the same database AND to have a variety of symbols, linestyles and fills to depict 'types' of record. Hopefully, Gilbert has a solution to his 'create points' problem by now. Perhaps you could comment or discuss with other listers on this issue??. Regards John Ievers Fuel starved in the UK (Petrol blockades just lifting now - for those not aware!!) -Original Message- From: Michel Larue <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Date: 15 September 2000 13:03 Subject: Re: MI Creating points >Dear Gilbert, > >It is because MapInfo can have only one object attached to one record, and >the object is already there, it is your polyon. In fact mixing polygons and >points is not either a good idea, and is even forbidden in Arcview. So I >suggest that you save a copy of your polygon table with another name, open >this table, update your columns with centroidX and centroidY, remove the >polygons and create points. > >Have Fun > >Michel Larue > >At 11:51 14/09/00 -0400, you wrote: >>Could someone help me with the Create points command from the Table menu? >> >>I have a polygon table which is editable, I created 2 new columns in the >>associated browser that I filled with the X and Y coordinates of the >>polygon's centroid. Then I'm using the Create points command to get that >>central point feature for each polygon. I get no error message, but no >>points either. Why this? >> >>_ >> >>Yves Gilbert >>Agent de recherche/Research Officer >> >> >>-- >>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] -- 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 Creating points
Michel I was interested in your comment that mixing polygons and points in the same table is not either a good idea, and is even forbidden in Arcview. A major factor in choosing Mapinfo for us, was that it DOES have the flexibility to store points, lines, polygons and text objects in the same database AND to have a variety of symbols, linestyles and fills to depict 'types' of record. Hopefully, Gilbert has a solution to his 'create points' problem by now. Perhaps you could comment or discuss with other listers on this issue??. Regards John Ievers Fuel starved in the UK (Petrol blockades just lifting now - for those not aware!!) -Original Message- From: Michel Larue <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Date: 15 September 2000 13:03 Subject: Re: MI Creating points >Dear Gilbert, > >It is because MapInfo can have only one object attached to one record, and >the object is already there, it is your polyon. In fact mixing polygons and >points is not either a good idea, and is even forbidden in Arcview. So I >suggest that you save a copy of your polygon table with another name, open >this table, update your columns with centroidX and centroidY, remove the >polygons and create points. > >Have Fun > >Michel Larue > >At 11:51 14/09/00 -0400, you wrote: >>Could someone help me with the Create points command from the Table menu? >> >>I have a polygon table which is editable, I created 2 new columns in the >>associated browser that I filled with the X and Y coordinates of the >>polygon's centroid. Then I'm using the Create points command to get that >>central point feature for each polygon. I get no error message, but no >>points either. Why this? >> >>_ >> >>Yves Gilbert >>Agent de recherche/Research Officer >> >> >>-- >>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 Creating points
To make the procedure even simpler, you do not have to create and populate the 2 columns. With your copy of the region table open, write and run from the MapBasic window update your_table_name set obj= createpoint(centroidx(obj),centroidy(obj)) If you are not positively sure that there are only regions in your table, start by selecting those select * from your_table_name where str$(objectinfo(obj,1)="7" into sel then update sel set obj= createpoint(centroidx(obj),centroidy(obj)) Jacques PARIS e-mail[EMAIL PROTECTED] For MapInfo support, see the Paris PC Consult enr. site at http://www.total.net/~rparis/gisproducts.htm -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Michel Larue Sent: September 15, 2000 12:42 AM To: [EMAIL PROTECTED] Subject: Re: MI Creating points Dear Gilbert, It is because MapInfo can have only one object attached to one record, and the object is already there, it is your polyon. In fact mixing polygons and points is not either a good idea, and is even forbidden in Arcview. So I suggest that you save a copy of your polygon table with another name, open this table, update your columns with centroidX and centroidY, remove the polygons and create points. Have Fun Michel Larue At 11:51 14/09/00 -0400, you wrote: >Could someone help me with the Create points command from the Table menu? > >I have a polygon table which is editable, I created 2 new columns in the >associated browser that I filled with the X and Y coordinates of the >polygon's centroid. Then I'm using the Create points command to get that >central point feature for each polygon. I get no error message, but no >points either. Why this? > >_ > >Yves Gilbert >Agent de recherche/Research Officer > > >-- >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 Creating points
Dear Gilbert, It is because MapInfo can have only one object attached to one record, and the object is already there, it is your polyon. In fact mixing polygons and points is not either a good idea, and is even forbidden in Arcview. So I suggest that you save a copy of your polygon table with another name, open this table, update your columns with centroidX and centroidY, remove the polygons and create points. Have Fun Michel Larue At 11:51 14/09/00 -0400, you wrote: >Could someone help me with the Create points command from the Table menu? > >I have a polygon table which is editable, I created 2 new columns in the >associated browser that I filled with the X and Y coordinates of the >polygon's centroid. Then I'm using the Create points command to get that >central point feature for each polygon. I get no error message, but no >points either. Why this? > >_ > >Yves Gilbert >Agent de recherche/Research Officer > > >-- >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 creating points from centroids
Sidney, This is a one step process using the MapBasic Window: 1. First make a copy of your table 2. Open the MapBasic window (Options > Show Mapbasic Window) 3. Type in: update YOUR_TABLE set obj=CreatePoint(CentroidX(obj),CentroidY(obj)) where YOUR_TABLE is the name of your mapinfo table. Hope this helps, Chris Perry Systems Development CoOrdinator Parks Victoria Melbourne, Australia Ph: 61 3 9816 6800 Fax: 61 3 9816 9876 [EMAIL PROTECTED] > -Original Message- > From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]] > Sent: Thursday, April 27, 2000 3:48 PM > To: [EMAIL PROTECTED] > Subject: MI creating points from centroids > > Hello users, > > I have a polygon coverage of Census Enumeration Areas for a particular > urban > region, from which I would like to create a point theme consisting solely > of > points located at the centroids of each Enumeration Area. Has anyone done > > something like this before, and if so, how do you go about doing it? Any > help would really be appreciated. > > Regards, > -Sidney > > - - > > Sidney McLean > Income Security and Social Development Studies > Applied Research Branch > Human Resource Development Canada > 165 Hotel de Ville > Phase II, 7th Floor > Hull, Quebec > K1A 0J2 > -- > 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 creating points from centroids
Sidney Another alternative to Will's suggestion is to make a copy of the table (called say "My_New_Table") and issue the following command in the mapbasic window Update My_New_Table set object = createpoint(centroidx(obj),centroidy(obj)) This bypasses the need to store the x/y (lat/Long) values regards Martin == Martin Roundill GIS Manager Waitakere City Council Private Bag 93109 Henderson Waitakere City New Zealand -Original Message- From: Mitchell, Will [mailto:[EMAIL PROTECTED]] Sent: Friday, 28 April 2000 09:02 To: '[EMAIL PROTECTED]'; [EMAIL PROTECTED] Subject: RE: MI creating points from centroids Try this, Add a column called LAT and one called LONG to your table under table>maintenance>table structure (set them to type of float). Update the LAT column with Centroid(y), and the LONG column with centroid(x). Export a copy of that table as delimited text. Open the text file, and create points using LAT and LONG, and voila, you have a point layer of the centroids of those polygons complete with the table of attributes. Will Mitchell GIS Manager The Environmental Company, Inc. 2496 Old Ivy Rd Charlottesville, VA 22905 ph 804.295.4446 fx 804.295.4435 http://www.tecinc.com > -Original Message- > From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]] > Sent: Thursday, April 27, 2000 3:48 PM > To: [EMAIL PROTECTED] > Subject: MI creating points from centroids > > Hello users, > > I have a polygon coverage of Census Enumeration Areas for a particular > urban > region, from which I would like to create a point theme consisting solely > of > points located at the centroids of each Enumeration Area. Has anyone done > > something like this before, and if so, how do you go about doing it? Any > help would really be appreciated. > > Regards, > -Sidney > > - - > > Sidney McLean > Income Security and Social Development Studies > Applied Research Branch > Human Resource Development Canada > 165 Hotel de Ville > Phase II, 7th Floor > Hull, Quebec > K1A 0J2 > -- > 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 creating points from centroids
Try this, Add a column called LAT and one called LONG to your table under table>maintenance>table structure (set them to type of float). Update the LAT column with Centroid(y), and the LONG column with centroid(x). Export a copy of that table as delimited text. Open the text file, and create points using LAT and LONG, and voila, you have a point layer of the centroids of those polygons complete with the table of attributes. Will Mitchell GIS Manager The Environmental Company, Inc. 2496 Old Ivy Rd Charlottesville, VA 22905 ph 804.295.4446 fx 804.295.4435 http://www.tecinc.com > -Original Message- > From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]] > Sent: Thursday, April 27, 2000 3:48 PM > To: [EMAIL PROTECTED] > Subject: MI creating points from centroids > > Hello users, > > I have a polygon coverage of Census Enumeration Areas for a particular > urban > region, from which I would like to create a point theme consisting solely > of > points located at the centroids of each Enumeration Area. Has anyone done > > something like this before, and if so, how do you go about doing it? Any > help would really be appreciated. > > Regards, > -Sidney > > - - > > Sidney McLean > Income Security and Social Development Studies > Applied Research Branch > Human Resource Development Canada > 165 Hotel de Ville > Phase II, 7th Floor > Hull, Quebec > K1A 0J2 > -- > 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 creating points from centroids
Hi Sidney It's pretty simple actually - just a few steps. 1) Make a copy of your original table - use File | Save Copy As 2) Close the original and open the copy 3) Use the Table | Maintenance | Table Structure command to add two columns to your new table - call them X and Y and set the type to Decimal 16, 8 4) Use the Table | Update Column command to get the centroid information into the new columns - you'l do this twice, once for X and once for Y. Pick your table, select the X or Y column and then, for the Value field, type either CentroidX(obj) or CentroidY(obj). 5) Save your table 6) Select Table | Maintenance | Table Structure and select your table. Uncheck the "Table Is Mappable" option and click "Ok". You have just removed the map objects from your table. 7) Select Table | Create Points, select your table, make sure the X and Y columns are set correctly, and click Ok. You now have a map of points representing the centroids of the polygons you started with. Regards, James James L Marlow Director, Geographic Information Systems Channel Marketing Corporation 15032 Beltway Drive Addison, Texas 75001 Telephone 1 (972) 858-9600 extension 331 Facsimile 1 (972) 858-9601 email: [EMAIL PROTECTED] www: http://cmcus.com > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Thursday, April 27, 2000 2:48 PM > To: [EMAIL PROTECTED] > Subject: MI creating points from centroids > > > Hello users, > > I have a polygon coverage of Census Enumeration Areas for a > particular urban > region, from which I would like to create a point theme > consisting solely of > points located at the centroids of each Enumeration Area. > Has anyone done > something like this before, and if so, how do you go about > doing it? Any > help would really be appreciated. > > Regards, > -Sidney > > - - > > Sidney McLean > Income Security and Social Development Studies > Applied Research Branch > Human Resource Development Canada > 165 Hotel de Ville > Phase II, 7th Floor > Hull, Quebec > K1A 0J2 > -- > 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 creating points of different colours
Elliot, create the points first then try making a thematic map of the points based on the values in your column hope this helps Mick Saunders - Original Message - From: Elliot Tinton EG CEFAS (DN=EJT00, RECIPIENTS, LOWESTOFT, CEFAS) <[EMAIL PROTECTED]> To: 'MAPINFO-L' <[EMAIL PROTECTED]> Sent: Tuesday, April 04, 2000 9:38 AM Subject: MI creating points of different colours > Hello All, > > An easy one for you: > > How do I create different points of different colours based on a column of numbers ? At the moment I just use create points for the whole lot and get the same type of symbols throughout. I have tried CreatePoint etc in MapBasic but have to go through the table line by line and I can't get it to work properly (unless its just very slow). Any help would be appreciated. > > Thanks very much > > Elliot. > -- > 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 creating points of different colours
"Elliot Tinton EG CEFAS (DN=EJT00, RECIPIENTS, LOWESTOFT, CEFAS)" wrote: > > Hello All, > > An easy one for you: > > How do I create different points of different colours based on a column of numbers? Hi Elliot! My suggestion is that you create a standard symbol, maybe a basic dot or square and then make a thematic template for the advanced display you want to create. This is much simpler and much more flexible, since a change in the numbers will be immediately visible. Also, cartography can easily be adapted for different purposes simply by changing or editing the template. 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]
RE: MI Creating points and showing on a separate map
Did you use the Create Points utility from the Table Menu and assign the proper columns of your spreadsheet to Lat and Long? Were your Lats and Longs in Decimal format? Did you use negative numbers for East and South and positive numbers for North and West instead of N, S E and W? You need to answer yes these questions. William Woodruff Zoning Administrator Charter Township of Union, T14 N R4W, Isabella County, Michigan -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of James Schumm Sent: Wednesday, February 02, 2000 3:11 PM To: [EMAIL PROTECTED] Subject: MI Creating points and showing on a separate map Hello all, I created points manually (lat,lon) in a spreadsheet program and am attempting to bring them into a MI map. The scales seem to be way off and I guess I figured it should be easier than it is. Any help would be great. Thanks. Jim Schumm == James R. Schumm MDRC (Manpower Demonstration Research Corporation) 16 East 34th Street NY, NY 10016 PHONE: (212) 340-8866 FAX: (212) 684-0832 == -- 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 Creating Points Problem in 5.5
Dear Kris The fields that contain X, Y cordinates must be numeric and not a character string! Regards Bob In message <[EMAIL PROTECTED] t>, [EMAIL PROTECTED] writes >Hello List >I know I have posted this problem before, but when I looked back on the >Mapinfo-L Archives the responses to my question were deleted. So I will ask >again, I am trying to create points from a two tables I created in Excel >and geocoded using MapMarker. The files geocoded correctly but when I open >the files in MapInfo and try to create points there are some problems. With >one table the create points option is grayed out and is unaccesable, with >the other table the create points option is available but when I click on >create points and the dialog box appears the fields containing my lat / >longs are not available choices. Please help! Sorry about the repeat >question. TIA > >Kris Kobylski >[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] -- Bob Young -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
