--- title: "1D urban build tab | User Interface" slug: "1d-urban-build-tab" description: "Learn how to navigate the 1D urban build tab. " tags: ["1D urban modelling"] updated: 2023-11-07T14:15:57Z published: 2023-11-07T14:15:57Z canonical: "help.floodmodeller.com/1d-urban-build-tab" stale: true --- > ## Documentation Index > Fetch the complete documentation index at: https://help.floodmodeller.com/llms.txt > Use this file to discover all available pages before exploring further. # 1D urban build tab The **1D Urban Build** tab is accessed via the fourth tab in top ribbon by default. This tab contains functionality related to building and editing your 1D urban networks. ![](https://cdn.document360.io/5074bc26-a9ef-4bf4-b1de-a5c6ce628aca/Images/Documentation/Capture.PNG) --- Select from the categories below for further details [General](/v1/docs/1d-urban-build-tab#general) [](/v1/docs/1d-urban-build-tab#general)**[](/v1/docs/1d-urban-build-tab#general)** [Linking](/v1/docs/1d-urban-build-tab#linking) [View](/v1/docs/1d-urban-build-tab#view) [Edit](/v1/docs/1d-urban-build-tab#edit) [Urban selection mode toggle](/v1/docs/1d-urban-build-tab#urban-selection-mode-toggle) [Build](/v1/docs/1d-urban-build-tab#build) ### General **Load Urban Network** This button opens a standard Windows File Explorer window to allow you to navigate to the location of, and then [load, an urban network file](/v1/docs/how-to-load-a-1d-urban-network) (extension .inp). The urban network will load in various places in the interface, including the **Map** view and **Project** panel. **New** This button allows you to create a [new, blank 1D urban network](/v1/docs/how-to-start-a-new-1d-urban-network). You will be prompted to first specify a location and filename for your urban network. **Save** This button [saves the currently loaded, active urban network](/v1/docs/how-to-save-a-1d-urban-network). This will be saved directly over the existing file, so use **Save As** or **Copy** (details below) if you would like to retain a copy of the original network. **Save as** This button opens a standard Windows File Explorer window to allow you enter a filename and to navigate to a save location to [save the currently loaded, active urban network](/v1/docs/how-to-save-a-1d-urban-network). The urban network is saved in a file with extension .inp. **Copy** also performs this functionality, but retaining both networks loaded in the **Project** panel. --- ### Linking **1D Urban / 1D River** This button opens the [Urban to River Linking Tool](/v1/docs/link-references). **1D Urban / 2D** This button activates [1D Urban/2D linking](/v1/docs/link-elements) in the urban network panel on the right-hand-side of the screen. --- ### View These checkboxes allow you to adjust the icons/labels visible on the map view, specifically those related to urban networks. These checkboxes are also available on the **Home** tab. --- ### Edit **Node Properties** This button opens the properties of the urban node currently selected in the **map** view and/or **1D Urban Network** panel. **Link Properties** This button opens the properties of the urban link currently selected in the **map** view and/or **1D Urban Network** panel. --- ### Urban selection mode toggle This button allows you to toggle urban selection mode on and off. This is identical to the functionality provided by the right-click menu on the **map** view. You must be in **1D Urban** selection mode (with the button highlighted in blue) to select urban nodes on the map. In **1D River** selection mode (with the button not hightlighted in blue), you can only select river nodes on the map. --- ### Build **Add link** This button opens a new window to allow you to add a new link to your active urban network. Links allow flow between urban nodes, and represent pipes in your urban system. This could be of type [Urban Conduit Link](/v1/docs/the-urban-conduit-link), or an [Urban Pump or Flow-divider (Orifice, Weir or Outlet) Link](/v1/docs/the-urban-pump-and-flow-regulator-links). **Junction** This button allows you to add a new [Urban Junction Node](/v1/docs/the-urban-junction-node) to your active urban network. Junction nodes represent manholes and drains in your urban system, and connections between pipes. **Outfall** This button allows you to add a new [Urban Outfall Node](/v1/docs/the-urban-outfall-node) to your active urban network. Outfall nodes represent terminal downstream outflow pipes from your urban system. **Rain Gage** This button allows you to add a new [Urban Rain Gage Node](/v1/docs/the-urban-rain-gage-node) to the map. Timeseries data can be assigned to this, and the Rain Gage node can then provide the rain falling on Subcatchment nodes in your urban system. **Storage** This button allows you to add a new [Urban Storage Node](/v1/docs/the-urban-storage-node) to your active urban network. **Divider** This button allows you to add a new [Urban Flow-Divider Node](/v1/docs/the-urban-storage-node) to your active urban network. **Subcatchment** This button turns the cursor into a pencil, allowing you to draw the outline of a subcatchment. On completion of the outline, a new [Urban Subcatchment Node](/v1/docs/the-urban-subcatchement-node) will be automatically added to your active urban network. **Multiple (checkbox)** Checked by default, this enables multiple nodes to be added to the map once the node type has been selected. **Edit Subcatchment** This button opens a menu with further buttons to enable editing of your subcatchment outlines for visual purposes only. **Edit Link Vertices** This button opens a menu with further buttons to enable editing of your links for visual purposes only.