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SpaceGroupUCL / Depthmap

( NOT ACTIVE - Check depthmapX ) Depthmap Spatial Network Analysis Software is a single software platform to perform a set of spatial network analyses designed to understand social processes within the built environment.
http://varoudis.github.io/depthmapX/
GNU General Public License v3.0
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[BUG] Depthmap Fails to Delete Axial Lines #4

Closed ylerman closed 11 years ago

ylerman commented 12 years ago

There is a bug in the latest DepthMap versions related to manual deletion of axial lines.

The program deletes the wrong lines when trying to remove axial line or just crashes.

This bug happens on every .dxf and .grpah, so you can use gallery.dxf or any other

  1. Create the axial line map and
  2. Use "Reduce to Fewest Line Map..."
  3. Go to "Fewest-Line Map (Minimal)"
  4. Press "Editable Off" to allow editing.
  5. Select an axial line and try yo delete it.
  6. A wrong line was removed or the program had crashed.

This issue doesn't happen when using DepthMap 8.15.

Thank you very much, Yoav Lerman. Department of Geography and Human Environment Tel-Aviv University

varoudis commented 12 years ago

Will look into it.

Tasos

ylerman commented 11 years ago

Hi Tasos, Did you have a chance to look into this bug? This happens also in the new DepthMapX version whenever you delete axial lines not related to the "fewest line map". Thanks, Yoav.

2012/4/20 Tasos Varoudis < reply@reply.github.com

Will look into it.

Tasos

Reply to this email directly or view it on GitHub: https://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-5241288

SpaceGroupUCL commented 11 years ago

Ill move it to the new repo. "deleting" was a problem in the old version, I thought I fixed some of them. Ill check.

SpaceGroupUCL commented 11 years ago

(initial thoughts) after investigation this bug seems to be deeply rooted into the core. I've also found a comment form Alasdair saying "lets hope that works".

It might take longer to uncover.

Tasos

(I have posted you report on the depthmapX side)

ylerman commented 11 years ago

Thanks a lot for looking into this. I hope it will be resolved. It has to do probably with the way memeory for the objects is allocated and destroyed on deletion.

saiwentang commented 11 years ago

Hi. I have a bug with both depthmap and depthmap X when I use "reduce to fewest line map". It keeps crashing when the process is arriving 73%. Actually this function worked pretty well before. but for this time, the data is much bigger. Could this be the reason? Is there anyone can help me solve this problem, please? Many thanks! Saiwen

SpaceGroupUCL commented 11 years ago

The problem is probably in your import file. There is some glitch in your drawing maybe? Without test data its impossible to help you.

Tasos

On 4 Feb 2013, at 17:49, saiwentang notifications@github.com<mailto:notifications@github.com> wrote:

Hi. I have a bug with both depthmap and depthmap X when I use "reduce to fewest line map". It keeps crashing when the process is arriving 73%. Actually this function worked pretty well before. but for this time, the data is much bigger. Could this be the reason? Is there anyone can help me solve this problem, please? Many thanks! Saiwen

— Reply to this email directly or view it on GitHubhttps://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-13089361.

saiwentang commented 11 years ago

Hi, Tasos. Depthmap has already computed all line map.  The file is a .graph file. Kind regards! Saiwen

From: SPACE Group - UCL (T.Varoudis) notifications@github.com To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com Cc: saiwentang saiwentang@yahoo.com Sent: Monday, February 4, 2013 7:20 PM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

The problem is probably in your import file. There is some glitch in your drawing maybe? Without test data its impossible to help you.

Tasos

On 4 Feb 2013, at 17:49, saiwentang notifications@github.com<mailto:notifications@github.com> wrote:

Hi. I have a bug with both depthmap and depthmap X when I use "reduce to fewest line map". It keeps crashing when the process is arriving 73%. Actually this function worked pretty well before. but for this time, the data is much bigger. Could this be the reason? Is there anyone can help me solve this problem, please? Many thanks! Saiwen

— Reply to this email directly or view it on GitHubhttps://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-13089361. — Reply to this email directly or view it on GitHub.

saiwentang commented 11 years ago

Hi. In the all line map, there are 163525 lines. Is this map too big? Saiwen

From: SPACE Group - UCL (T.Varoudis) notifications@github.com To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com Cc: saiwentang saiwentang@yahoo.com Sent: Monday, February 4, 2013 7:20 PM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

The problem is probably in your import file. There is some glitch in your drawing maybe? Without test data its impossible to help you.

Tasos

On 4 Feb 2013, at 17:49, saiwentang notifications@github.com<mailto:notifications@github.com> wrote:

Hi. I have a bug with both depthmap and depthmap X when I use "reduce to fewest line map". It keeps crashing when the process is arriving 73%. Actually this function worked pretty well before. but for this time, the data is much bigger. Could this be the reason? Is there anyone can help me solve this problem, please? Many thanks! Saiwen

— Reply to this email directly or view it on GitHubhttps://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-13089361. — Reply to this email directly or view it on GitHub.

saiwentang commented 11 years ago

Dear Tasos I still got the problem of reducing the all line axial map into fewest line map. The all line map is generated in Depthmap, so the file is a .graph file. In the all line map, There are 163525 lines. Every time it crashed when I tried to reduce the all line map into fewest line map. Could you please help me sort it out? Many thanks! Saiwen

SpaceGroupUCL commented 11 years ago

Looks big to me. But I haven't used a map that big to be honest.

The only think I can do of you is to test your map, if you want to submit a test file.

Tasos

On 6 Feb 2013, at 11:28, saiwentang notifications@github.com<mailto:notifications@github.com> wrote:

Dear Tasos I still got the problem of reducing the all line axial map into fewest line map. The all line map is generated in Depthmap, so the file is a .graph file. In the all line map, There are 163525 lines. Every time it crashed when I tried to reduce the all line map into fewest line map. Could you please help me sort it out? Many thanks! Saiwen

— Reply to this email directly or view it on GitHubhttps://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-13177662.

saiwentang commented 11 years ago

Dear Tasos

Thank you for your help. I attached the all line map I generated using Depthmap. My computer is windows 7, 64 bit with 32 G ram. So my computer should be capable of doing the computation.

Could you please inform me the probable time you expect to solve this problem? Because I have to rearrange my research.    The document I sent you is a copyright map.  If you are willing to use it in the future for academic purpose, recommaded reference as followed: Alain Chiaradia, Saiwen Tang and Valerio Audisio,(2013), Planning and Geography, Cardiff University.

Kind regards! Saiwen

From: SPACE Group - UCL (T.Varoudis) notifications@github.com To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com Cc: saiwentang saiwentang@yahoo.com Sent: Wednesday, February 6, 2013 11:40 AM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

Looks big to me. But I haven't used a map that big to be honest.

The only think I can do of you is to test your map, if you want to submit a test file.

Tasos

On 6 Feb 2013, at 11:28, saiwentang notifications@github.com<mailto:notifications@github.com> wrote:

Dear Tasos I still got the problem of reducing the all line axial map into fewest line map. The all line map is generated in Depthmap, so the file is a .graph file. In the all line map, There are 163525 lines. Every time it crashed when I tried to reduce the all line map into fewest line map. Could you please help me sort it out? Many thanks! Saiwen

— Reply to this email directly or view it on GitHubhttps://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-13177662. — Reply to this email directly or view it on GitHub.

saiwentang commented 11 years ago

Saiwen's message:

"Clerkenwell Graph"

Click here to view: https://www.dropbox.com/l/PQcKhfsMgqliveDM

(Saiwen shared this file using Dropbox. Enjoy!)

saiwentang commented 11 years ago

Hi.  Because the size of the document, I sent it the via Dropbox. You should be able to receive my invitation in a minute. Saiwen

From: Saiwen Tang saiwentang@yahoo.com To: SpaceGroupUCL/Depthmap reply@reply.github.com Cc: Alain Chiaradia zen63296@zen.co.uk Sent: Wednesday, February 6, 2013 4:27 PM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

Dear Tasos

Thank you for your help. I attached the all line map I generated using Depthmap. My computer is windows 7, 64 bit with 32 G ram. So my computer should be capable of doing the computation.

Could you please inform me the probable time you expect to solve this problem? Because I have to rearrange my research.    The document I sent you is a copyright map.  If you are willing to use it in the future for academic purpose, recommaded reference as followed: Alain Chiaradia, Saiwen Tang and Valerio Audisio,(2013), Planning and Geography, Cardiff University.

Kind regards! Saiwen

From: SPACE Group - UCL (T.Varoudis) notifications@github.com To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com Cc: saiwentang saiwentang@yahoo.com Sent: Wednesday, February 6, 2013 11:40 AM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

Looks big to me. But I haven't used a map that big to be honest.

The only think I can do of you is to test your map, if you want to submit a test file.

Tasos

On 6 Feb 2013, at 11:28, saiwentang notifications@github.com<mailto:notifications@github.com> wrote:

Dear Tasos I still got the problem of reducing the all line axial map into fewest line map. The all line map is generated in Depthmap, so the file is a .graph file. In the all line map, There are 163525 lines. Every time it crashed when I tried to reduce the all line map into fewest line map. Could you please help me sort it out? Many thanks! Saiwen

— Reply to this email directly or view it on GitHubhttps://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-13177662. — Reply to this email directly or view it on GitHub.

SpaceGroupUCL commented 11 years ago

Hi, Im sorry to say that, but your map is HUGE! (huge is an underestimate too)

I believe that your cad file has many glitches, that even with manual correction (in a cad software) will take you a lot of time. SpaceSyntax has an Axial map of London. Maybe go that route? (or try to fix your cad file and run the analysis on smaller segments of the map first)

Ill close this as its not a bug. Tasos

saiwentang commented 11 years ago

When you say glitches in my cad file, do you mean the small isolated polygons outside of the main system. Cause this could be quickly fixed with ArcGis. Saiwen

From: SPACE Group - UCL (T.Varoudis) notifications@github.com To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com Cc: saiwentang saiwentang@yahoo.com Sent: Wednesday, February 6, 2013 4:47 PM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

Hi, Im sorry to say that, but your map is HUGE! (huge is an underestimate too) I believe that your cad file has many glitches, that even with manual correction (in a cad software) will take you a lot of time. SpaceSyntax has an Axial map of London. Maybe go that route? (or try to fix your cad file and run the analysis on smaller segments of the map first) Ill close this as its not a bug. Tasos — Reply to this email directly or view it on GitHub.

saiwentang commented 11 years ago

Hi. Did you try compute it in your computer. I agree it is not a bug. But does it mean DepthMap can not computer least map for such a big site. Is that any other way to do it, cause I do need Automatic axial map to carry on my research other than the axial map made by hand. Saiwen

From: SPACE Group - UCL (T.Varoudis) notifications@github.com To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com Cc: saiwentang saiwentang@yahoo.com Sent: Wednesday, February 6, 2013 4:47 PM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

Hi, Im sorry to say that, but your map is HUGE! (huge is an underestimate too) I believe that your cad file has many glitches, that even with manual correction (in a cad software) will take you a lot of time. SpaceSyntax has an Axial map of London. Maybe go that route? (or try to fix your cad file and run the analysis on smaller segments of the map first) Ill close this as its not a bug. Tasos — Reply to this email directly or view it on GitHub.

SpaceGroupUCL commented 11 years ago

Not only. I can think of many but: very small corners (that might freakout with float precision), not well connected lines… But in general you need to start with a simpler map, not a GIS export of half the London. Build/Clean small areas one by one and analyse as you go.

Tasos

On 6 Feb 2013, at 16:53, saiwentang notifications@github.com<mailto:notifications@github.com> wrote:

When you say glitches in my cad file, do you mean the small isolated polygons outside of the main system. Cause this could be quickly fixed with ArcGis. Saiwen

From: SPACE Group - UCL (T.Varoudis) notifications@github.com<mailto:notifications@github.com> To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com<mailto:Depthmap@noreply.github.com> Cc: saiwentang saiwentang@yahoo.com<mailto:saiwentang@yahoo.com> Sent: Wednesday, February 6, 2013 4:47 PM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

Hi, Im sorry to say that, but your map is HUGE! (huge is an underestimate too) I believe that your cad file has many glitches, that even with manual correction (in a cad software) will take you a lot of time. SpaceSyntax has an Axial map of London. Maybe go that route? (or try to fix your cad file and run the analysis on smaller segments of the map first) Ill close this as its not a bug. Tasos — Reply to this email directly or view it on GitHub.

— Reply to this email directly or view it on GitHubhttps://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-13192023.

SpaceGroupUCL commented 11 years ago

I would put the quality of your map first. The "size" of the map, number of lines, might be OK (for automatic generation). Check my above post.

Direct other replies to my email. Tasos

jorgegil commented 11 years ago 
Dear Saiwen,
As Tasos put it, first you need to clean and generalise the geometry
of your base map as much as possible. This is easily doable in
ArcGIS, as you know. The reason of the hangup is not necessarily the
number of lines but the number of points in your polygons.
As for Axial line generation, it is meant for research as a proof of
concept and not meant for large area axial map production. You can
split it in chunks, others have done it, but you will always run
into problems at the edges between tiles. There the map won't be
correct.
There is an alternative by Liu and Jiang for ArcGIS 9, called
Axialgen, but they also explain that it won't be able to handle tens
of thousands of lines. You can give it a try though.
Alternatively, Axwoman 6 for ArcGIS 10 has a method for generating
axial maps from road centre lines. They have used it in rather large
maps of whole cities, including London, from OpenStreetMap data. Not
sure it serves your purpose as it is not exactly the same thing.
Hope this information is useful.
Best regards,
Jorge GilOn 06/02/2013 17:00, saiwentang wrote:
Hi.
  Did you try compute it in your computer. I agree it is not a bug.
  But does it mean DepthMap can not computer least map for such a
  big site. Is that any other way to do it, cause I do need
  Automatic axial map to carry on my research other than the axial
  map made by hand.
  Saiwen
  ________________________________
  From: SPACE Group - UCL (T.Varoudis)
  <notifications@github.com>
  To: SpaceGroupUCL/Depthmap <Depthmap@noreply.github.com> 
  Cc: saiwentang <saiwentang@yahoo.com> 
  Sent: Wednesday, February 6, 2013 4:47 PM
  Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines
  (#4)
  Hi, Im sorry to say that, but your map is HUGE! (huge is an
  underestimate too)
  I believe that your cad file has many glitches, that even with
  manual correction (in a cad software) will take you a lot of time.
  SpaceSyntax has an Axial map of London. Maybe go that route? (or
  try to fix your cad file and run the analysis on smaller segments
  of the map first)
  Ill close this as its not a bug.
  Tasos
  —
  Reply to this email directly or view it on GitHub.

    —
    Reply to this email directly or view
      it on GitHub. 

--

Jorge Gil PhD Candidate

TU Delft / Faculty of Architecture Department of Urbanism Chair of Spatial Planning and Strategy

Julianalaan 134 2628 BL Delft P.O. Box 5043 2600 GA Delft The Netherlands

www.tudelft.nl

saiwentang commented 11 years ago

Dear Jorge.

Thank you very much for your advice.

It is what we are doing to solve the issue. I did find problems along the cutting edge, which I think may be solved by processing a small area on both sides of the edge. 

Kind regards! Saiwen

From: Jorge Gil notifications@github.com To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com Cc: saiwentang saiwentang@yahoo.com Sent: Wednesday, February 6, 2013 8:12 PM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4)

Dear Saiwen, As Tasos put it, first you need to clean and generalise the geometry of your base map as much as possible. This is easily doable in ArcGIS, as you know. The reason of the hangup is not necessarily the number of lines but the number of points in your polygons. As for Axial line generation, it is meant for research as a proof of concept and not meant for large area axial map production. You can split it in chunks, others have done it, but you will always run into problems at the edges between tiles. There the map won't be correct. There is an alternative by Liu and Jiang for ArcGIS 9, called Axialgen, but they also explain that it won't be able to handle tens of thousands of lines. You can give it a try though. Alternatively, Axwoman 6 for ArcGIS 10 has a method for generating axial maps from road centre lines. They have used it in rather large maps of whole cities, including London, from OpenStreetMap data. Not sure it serves your purpose as it is not exactly the same thing. Hope this information is useful. Best regards, Jorge GilOn 06/02/2013 17:00, saiwentang wrote: Hi. Did you try compute it in your computer. I agree it is not a bug. But does it mean DepthMap can not computer least map for such a big site. Is that any other way to do it, cause I do need Automatic axial map to carry on my research other than the axial map made by hand. Saiwen

From: SPACE Group - UCL (T.Varoudis) notifications@github.com To: SpaceGroupUCL/Depthmap Depthmap@noreply.github.com Cc: saiwentang saiwentang@yahoo.com Sent: Wednesday, February 6, 2013 4:47 PM Subject: Re: [Depthmap] [BUG] Depthmap Fails to Delete Axial Lines (#4) Hi, Im sorry to say that, but your map is HUGE! (huge is an underestimate too) I believe that your cad file has many glitches, that even with manual correction (in a cad software) will take you a lot of time. SpaceSyntax has an Axial map of London. Maybe go that route? (or try to fix your cad file and run the analysis on smaller segments of the map first) Ill close this as its not a bug. Tasos — Reply to this email directly or view it on GitHub.

— Reply to this email directly or view it on GitHub.

Jorge Gil PhD Candidate

TU Delft / Faculty of Architecture Department of Urbanism Chair of Spatial Planning and Strategy

Julianalaan 134 2628 BL Delft P.O. Box 5043 2600 GA Delft The Netherlands

www.tudelft.nl — Reply to this email directly or view it on GitHub.

rimakanouna commented 9 years ago

Hi i just want to ask a question how to create a graph files because i can't use depthmap without a graph file please help me i really need it thank you

SpaceGroupUCL commented 9 years ago

this is not a general help forum. use the 'space syntax mail list'

soumimuhuri commented 8 years ago

Hi, I am just unable to import few dxf files in depthmap 10. The programme stops functioning whenever I try to do that. What could be the possible reasons and how do I resolve this?

varoudis commented 8 years ago

please use the list for general questions next time!

Only DXF file with just straight line can be used! NO curves, polylines, circles etc! Clean your files first.

Tasos

universityduhok commented 8 years ago

Hi all,

I faced this problem before, you need first to be sure if your dxf file are polygons (closed very well),

Also you make sure, if your drawings in one layer of lines (advice:try to redraw your drawings in Autocad in polyline*)

Best

Wafaa On 7 Mar 2016 20:08, "Tasos Varoudis" notifications@github.com wrote:

please use the list for general questions next time!

Only DXF file with just straight line can be used! NO curves, polylines, circles etc! Clean your files first.

Tasos

— Reply to this email directly or view it on GitHub https://github.com/SpaceGroupUCL/Depthmap/issues/4#issuecomment-193349675 .

soumimuhuri commented 8 years ago

Thanks a lot.