Topological Analysis with Microstation Geographics

Let's see the case, I have a number of plots in the cadastre, which are being affected by a high voltage line, I want to know which of these are, paint them in a different color and store them in a separate file.

1. Layer construction

Topology analysis microstation The layers can be created from what is visible, this can be in reference maps or in the open file. It is not necessary to have an open project, if I have objects with assigned attributes.

In this case, I have an open project, and I have visible the plots of the cadastre on which I want to make an analysis of which properties are affected by the axis of the busway.

The topological analysis is activated with "utilities / topology analysis". In this panel appear the alternatives to create, delete, deploy and add layers.

In this case, to create the parcel layer,

  • Active the level where they are stored (or the attribute that they have),
  • I select the type of layer (area) although it can be of lines or points
  • Then select the name; In this case it will be called "Urb1-15"
  • Below I select the line type, fill color and border. It can also be created based on a query (query) by means of the query builder or a stored one.

Then I apply the "create" button, immediately the layer is created, which I can show with the "display" button. At this moment, this layer is only stored in memory but I can store it as a .tlr file that can be called at any time ... even without having an open project.

If I want to add it to the map, use the "Add" button, this goes to the selected level and with visible colors or fillings.

Topology analysis microstation

In the same way I create the layer "high lines", for which I select the respective level. So now I have the two layers, what I want now is to analyze the plots that are affected by that busway axis.

Topology analysis microstation

2. Layer analysis

Topology analysis microstation The analysis is done by choosing "overlay / line to Area", then I select the line layer and areas that will be analyzed. The same can be "areas to areas" or "areas to points" for other cases.

Below shows me the alternative to choose which layer to maintain as a result, I select the plots (areas).

You can also choose the mode of analysis, "overlap" is the one that adapts more, although there are other forms such as inside, outside, coincidences etc.

The name of the resulting layer is written to the right and the alternative to maintaining the links to the database in the outgoing plots. The name of my layer will be "Affected properties"

To create the layer select "build", now you can see the created layer, for visualization purposes you touch and press the "display" button.

Topology analysis microstation

This alternative no longer exists in Bentley Map, or at least the treatment is totally different.

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