3.2.2. Numériser les structures assainissement

3.2.2.1. Généralités

TWW has a wizard to correctly collect manholes and special structures. see the The TWW wizard chapter.

Sélectionnez le bouton Assistant puis cliquez sur le bouton Commencer la saisie de données et choisir Ouvrage assainissement dans le menu déroulant.

3.2.2.2. Numérisation

Le curseur passe alors en mode numérisation et il est possible de sélectionner l’emplacement du nouvel élément.

Then the vw_tww_wastewater_structure form opens and you can start adding data in the General tab:

Sélectionnez le ws_type désiré (“regard” est sélectionné par défaut):

• Regard

• structure_speciale

• point_deversement

• installation_infiltration

Selon le ws_type, vous aurez différents champs et onglets dans le formulaire.

Ajoutez ensuite l’identifiant (il s’agit de l’attribut qui sera affiché sur la carte)

Note

If you do not enter an identifier, TWW will enter the obj_id also as identifier (you can change later). As default, the identifier of the wastewater structure is also the identifier of the cover and of the wastewater node.

Add other attributes in the General tab. You can also add attributes in the other tabs (Main Cover/Node, Wastewater Structure, Manhole, Structure Parts etc.).

Note

Le concept de l’onglet Général est que, dans le processus normal de numérisation (95% des regards), l’opérateur n’a pas besoin de changer d’onglet pour renseigner les attributs nécessaires.

Attention

You can not use Actions for digitize a detail geometry during creating a new manhole, because you have to save first the Wastewater Structure-record to the database before you can add a detail geometry. First safe the record.

You can add additional records Structure Parts or a second wastewater node in Tab Wastewater Nodes or Maintenance Events. But in the Tab Wastewater Nodes you will not see the main node, that is created with the new wastewater structure. You can see the main node in the tab Main Cover/Node. After saving the new wastewater structure, you will find two node in the tab Wastewater Nodes.

Cliquez OK pour fermer le formulaire

Sauvez les informations de la couche en stoppant l’assistant de saisie.

You can re-edit your point object selecting the edit mode and then click with the info cursor on the object you want to edit. If you do not select the edit mode, you can just look at the existing data.

Pour plus d’informations au sujet de l’édition de données, voir le chapitre Modification de données existantes.

3.2.2.3. Autres classes et attributs

When a wastewater_structure object is digitized, a series of steps take place in the background in the TWW database:

1. Un nouvel objet est ajouté dans la classe ouvrage_assainissement

2. Un nouvel objet sera crée et lié dans les sous-classes respectives [point_deversement, installation_infiltration, regard, ouvrage_spécial]

3. un nouvel objet couvercle est créé et lié à l’ouvrage assainissement

4. a new wastewater node object is generated (in wastewater network elements and its subclass wastewater nodes) and linked to the wastewater structure

5. the new cover and node are referred as main cover and main node of the wastewater structure

Note

The main node is the place, where the symbol of the wastewater structure is shown in TWW.

Note

delete this note?? To add a second cover or a second wastewater node to a wastewater structure, see the Modification de données existantes chapter.

3.2.2.4. Synchronisation de la géométrie

The added feature’s geometry defines the geometry of the connected tables like cover and wastewater node. The vw_tww_wastewater_structure-point itself has no Z value. When the level of the cover co_level is entered, this value is adapted to the Z value of the cover’s geometry. The bottom level of the wastewater node wn_bottom_level defines the Z value of the wastewater node’s geometry.

Note

If a cover level changes, the Z value of the cover’s geometry will be adjusted. When the geometry changes, the co_level attribut is adjusted as well. If both values change, the level takes precedence. On an insert it’s like when both value change. Means the cover’s geometry is set according to the cover level and if it’s NULL, the Z value is set to NaN. The same situation is on editing the wastewater node directly.