vdPClassify for NCLS

vdPClassify can also be used to convert existing DWG-files with their own layer coding to DWG-files compatible with NCLS (= Dutch CAD-standard for the GWW-sector). For this purpose, specific data-filters are created and property-filters for the conversion are set up.

During the analysis phase insight is gained into the current layer codings, used line types and block names. After that, a mapping is defined to the relevant NLCS-codes. When the control table is set up, the vdPClassify conversion function converts the existing structure into an NLCS-structure in the DWG.

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vdPClassify, migration fase

vdPClassify is developed to provide information on DWG elements to be stored in a migration scheme and also to capture the ‘mapping’ to the appropriate database tables and attributes.

From the vdPClassify analysis, the filters in the migration control table are made:

  • Is the layer name equal to “Cables_OV”?
  • Is there objectdata linked with the tablename “Cables”?
  • Then the object is a “Cable_OV” feature.

Next, information from the objects is read using powerful property filters.

  • Geometry from the coordinates.
  • Unique ID from AutoCAD handle.
  • Theme-name is directly in the control table.
  • Material from object data.
  • etc.

As an example, the result of one AutoCAD-polyline written to GML with limited IMKL-information.

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vdPClassify, analysis phase

vdPClassify is developed to provide information on DWG elements to be stored in a migration scheme and also to capture the ‘mapping’ to the appropriate database tables and attributes.

The first step in a vdPClassify project is an onsite analysis of the AutoCAD DWG files. With the help of functions from the vdPClassify toolkit, one of our consultants can analyze information about the drawing(s). Think of an overview of the layernames that are in use, what kind of elements are on these layers and is information linked to these elements in the form of xdata or objectdata. If a classification can be derived from the structure of the layernames, does color or linetype tell something about the status of the object, etc.

Based on this information, the smart data filters can be built with which the desired objects from the drawing(s) can be filtered.

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vdPClassify, introduction

vdPClassify is developed to provide information on DWG elements to be stored in a migration scheme and also to capture the ‘mapping’ to the appropriate database tables and attributes.

vdPClassify is currently being used for data migration projects for the WIBON (= Information Exchange Act above and underground networks).
By means of smart data filters, objects from the drawings are filtered. Next, information from the objects is read using powerful property filters.

In general you can recognize objects in an AutoCAD drawing by a combination of entitytype and layername, linetype or blockname. With this combination the IMKL-objecttype can be determined. In addition, AutoCAD elements contain information in the form of blockattributes, xdata or object data. This information can be converted to IMKL-attributes.

vdPClassify consists of a consulting toolkit. With which we can perform an onsite analysis, create a migration control table and write the data in the desired format.
Users can then independently perform the conversions using the vdPClassify runtime.

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AutoCAD Map/FDO – Spatial Query with displayMngr plugin

Spatial QueryGenerally GIS-data is available on a complete other scale than CAD-users need for their projects.

Importing that GIS-dataset into a CAD-environment gives an overkill of data. It would be very useful to add connections to the feature layers in GIS, limited to the area needed for the project.

This is possible by using AutoCAD Map/FDO Data Connect and a Spatial Query. But this is not very user friendly. That is why vdPConsulting has developed a displayMngr plugin.

This is the workflow:

  • Make sure that the desirable feature layers are connected, by using a pre-defined template or so called .layer files.
  • Load the displayMngr plugin.
  • Start the command “filterWindow” or “filterCrossing”.
  • Indicate the desirable area by picking two points on the map.
  • The plugin creates the SQL filter statements and “inject” these into the definitions of the connected feature layers.

If you want more information about using AutoCAD Map/FDO and GIS-databases or the displayMngr plugin, please contact me.