GIS applied to Municipality Management: Module 10 ‘How to convert cartography from CAD to GIS’

The video of the tenth module is now available, in which we will show how to load and manage cartography in CAD format on gvSIG.

Many municipalities have their geographic information in CAD format, and in many cases there’s an only file for the whole municipality that contains all type of information, such as power lines, parcels, drinking water system, sewage system…, each one in a different layer.

It sometimes makes it difficult to manage, even we have to divide the municipality into sheets to manage that information, where we lose information of our municipality as a group. In that case, to make queries, calculations…, we would have to open the different files.

The advantage of working with a Geographic Information System is that each type of information would be available in a different file (that would be the optimal way to work), and we would be able to overlap the different files (which would be ‘layers’ in our GIS) in the same View to be able to make analysis, consultations…

Another important advantage is that the vector layers in a GIS have an associated attribute table, and on the .SHP format, the most common in GIS, we can add all the fields that we want to that attribute table (length, area, owner, release date…). We will have a great amount of alphanumeric information of the different elements.

By having alphanumeric information it is easy, for example, to know the areas of all the parcels of our municipality at the same time, we wouldn’t have to select them individually like in a CAD. We could also make inquiries about them. For example we can make a query of parcels the area of which is larger than 1000 square meters with a simple sentence, where they would appear selected directly.

The cartography to follow this video can be downloaded from this link.

Here you have the videotutorial of this new module:

Related posts:

This entry was posted in CAD, english, gvSIG Desktop, training and tagged , , , . Bookmark the permalink.

19 Responses to GIS applied to Municipality Management: Module 10 ‘How to convert cartography from CAD to GIS’

  1. Chere says:

    Hola, cómo exportas anotaciones CAD a GIS? Gracias

    • Mario says:

      Hola, los textos de un CAD se representan en el GIS como un punto, y el valor lo tendrás en un campo llamado “Texto” en la tabla de atributos de la capa SHP. Los principales problemas serán: los textos en multilínea (ya que cada salto de línea será representado por un registro en la tabla), la asociación de los datos a elementos lineales como ejes de vías, el estilo y la simbología, y la codificación de caracteres. Saludos

      • Vasni Heriel Pech says:

        Hi Mario,

        Thank you for your prompt response. I have finished all the activities foe this course using ArcGIS 10.4 what is the next step to sent my wok done and get the Certification.
        Regards,

        Vasni

  2. Chere says:

    Eso es lo normal, pero me han pasado un archivo cad con las anotaciones como Polygon y no me deja exportarlo a shp. gracias

    • Mario says:

      ¿No lo puedes abrir en gvSIG directamente el archivo CAD? gvSIG soporta hasta DWG 2004, y al ser un formato cerrado ciertas geometrías pueden dar problema, como por ejemplo los bloques o tramados. De todas formas es recomendable exportar previamente a DXF 2000, que es el que mejor suele soportar gvSIG. Una vez cargado en gvSIG si lo exportas a SHP te creará un fichero por tipo, y en el de polígonos deberías tener dichas geometrías con su texto en la tabla. Si te sigue dando error sería recomendable que enviases el problema a la lista de usuarios. Aquí tienes toda la información: https://blog.gvsig.org/2015/06/15/que-hacer-cuando-sale-un-error-en-gvsig/
      Un saludo

      • Chere says:

        sí lo cargo directamente de dwg, las geometrías sí tienen su campo text pero no me deja exportar a shp. Por otro lado, tengo problemas con los bloques. Es posible, de alguna manera, exportar a sig un bloque de cad polyline que representa un símbolo puntual en sig y que me conserve la simbología? es decir, exportar a sig el bloque uniendo las polylines en un único punto y conservar la simbología del símbolo CAD.

        • Mario says:

          Sobre lo del problema al exportar sería recomendable que enviases a la lista el fichero gvSIG.log siguiendo las instrucciones indicadas en el post que te he comentado, a ver qué puede ser.
          Respecto al bloque, creo que una forma puede ser obtener una imagen de ese bloque, y tratarla si es necesario con un programa de dibujo tipo Gimp, y luego aplicarle simbología de imagen a la capa de puntos.

          • Chere says:

            Bueno Mario, el problema es que la capa de puntos no tiene nada, están todos estos elems de bloques en la capa de polylines

  3. Pingback: GIS applied to Municipality Management: Module 10 ‘How to convert cartography from CAD to GIS’ – GeoNe.ws

  4. Pingback: GIS applied to Municipality Management: Module 11 ‘Reprojecting vector layers’ | gvSIG blog

  5. Pingback: GIS applied to Municipality Management: Module 12 ‘Geoprocessing’ | gvSIG blog

  6. Pingback: GIS applied to Municipality Management: Module 13 ‘Layouts’ | gvSIG blog

  7. Pingback: GIS applied to Municipality Management: Module 14 ‘Image georeferencing’ | gvSIG blog

  8. Pingback: GIS applied to Municipality Management: Module 15 ‘gvSIG 3D’ | gvSIG blog

  9. Pingback: GIS applied to Municipality Management: Module 16.1 ‘gvSIG Online (Publishing cartography, advanced editing…)’’ | gvSIG blog

  10. Pingback: GIS applied to Municipality Management: Module 16.2 ‘gvSIG Online (Basic editing, hyperlink…)’ | gvSIG blog

  11. Pingback: GIS applied to Municipality Management: Module 16.3 ‘gvSIG Online (Connection with gvSIG Mobile and enumerations)’ | gvSIG blog

  12. Pingback: GIS applied to Municipality Management: Module 17 ‘gvSIG Mobile (Connection with gvSIG Desktop)’ | gvSIG blog

  13. Pingback: GIS applied to municipality management: Certification and links to the complete course | gvSIG blog

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s