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:
- Module 1: Differences between GIS and CAD
- Module 2: Introduction to reference systems
- Module 3: Views, layers, symbology, labelling
- Module 4.1: Attribute tables (alphanumeric information)
- Module 4.2: Attribute tables (joining tables)
- Module 5.1: Web services (Introduction to SDI)
- Module 5.2: Web services (Loading web services from gvSIG)
- Module 5.3: Web services (Non-standard services)
- Module 6: Add-ons manager
- Module 7.1: Editing (new layers, graphical and alphanumeric editing)
- Module 7.2: Editing (Derivative geometries)
- Module 8.1: Creation of point layers from tables (Geocoding: Points from a table with addresses)
- Module 8.2: Creation of point layers from tables (Event layers)
- Module 9: Hyperlink