Map Page

From H2Know-how Manual

The H2knOw-how map page is the primary interface for accessing all of your data on the H2knOw-how platform. The map view provides an interactive and intuitive spatial layout of assets and other information.

Using the Map Page

The H2knOw-how map page acts as a hub for most modules contained within the platform. Many useful features are available to assist users in navigating, interrogating, and managing their asset information.


  1. Search - The search tool allows users to search for assets or addresses on the map. Assets can be searched by asset name, and addresses can be searched by street name and number.
  2. Layer Tree - The layer tree is used to turn on and off layers on the map and navigate between active Projects FolderTreeIcon.png, Scenarios ScenariosTreeIcon.png, and Layers LayersTreeIcon.png.
  3. Tools menu - The tools menu contains various useful tools for working with information on the map.
  4. Alert panel - Opens the alert control panel.
  5. Main menu - Contains site navigation options and allows the user to log out.
  6. Map controls - Controls for navigating the map

Layer Tree Navigation

The layer tree allows users to control exactly what is shown on their map view. Map layers can be turned on and off by selecting/deselecting the corresponding check-box next to each layer.


  1. Represents FolderTreeIcon.png the project level of the tree. Clicking on a label at the project level will switch the active Project. The active Project will appear in bold. It is important to note the active project. Even though you can view map layers from multiple projects concurrently, you can only select items on the map that belong to the active
  2. The scenario ScenariosTreeIcon.png is the second highest level of the layer tree. A scenario is can be any unique set of values that H2knOw-how saves and can be substituted and viewed automatically. You can switch between active Scenarios using the drop-down at the scenario level (provided there is more than one available scenario to choose from).
  3. Layer groups LayersTreeIcon.png represents groups of layers that are available to view on the map. There is no limit to the number of groups or sub-groups available at each level. Drop down lists are available when mutually exclusive layers or layer groups are available.

Tools menu

The tools menu provides users with useful functionality for working with their assets and data. The functionality of each tool is described below.

Import/Export data

The import and export tool allows users to upload (add/modify) or download data associated with gauges in their projects. H2knOw-how can be configured to import and export data in specialized formats to meet specific requirements. It is important to note that once generated, the data will automatically start downloading onto the main Map Page when ready.

Manage Scenarios

The scenario management tool Treestruct 24x24.png allows users to view their scenarios in a tree structure, and switch between different scenarios easily. The scenario management tool also allows users to instantly start a hydraulic model run if available. Results from the model runs can be viewed directly on the map page after completion. For an overview of what a scenario is and how they work, refer to the section.

Export map

The map export tool Print 24x24.png allows users to export snapshots of the map page into PDF or other image format. Exports produced by H2knOw-how use the Open Street Map tile sets and show all of the currently selected layers. Users can also select export templates to add titles and other data to the plot.

Link map

The link map tool Link 24x24.png allows users to get a URL link of their current view on the map page. This link can saved for later reference, or be shared with other authenticated users. When a user visits the URL provided through the link map tool, the map view instantly loads the exact state (project, layers and view extent) that were active when the link was generated.

Map controls

The following controls are available to help navigate the physical map view. By default (when no control is selected), users are able to pan around the map view by clicking and dragging the view. The other available controls are described below.

  • Zoom inactivated 24x24.png The zoom in tool enables zooming directly to a given extent, by drawing a box on the map. The box is drawn by holding down the left mouse button, whilst dragging the mouse.
  • ZoomFullExtent 24x24.png Zoom to the extent of the current project. This tool can be used to 'reset' the map view extent.
  • Ruler 24x24.png Measure lines and polygons on the map to calculate distances and areas.
  • Edit 24x24.png Add features directly onto the map. This feature is only available for certain modules and projects including Flood Plain Management, Trade Waste and MiPlant_(WWTP).
  • Through the tile-layers menu, users can change the type of map tiles that are displayed in the background. For example, the satellite tile-layer can be selected in order to better view the surrounding terrain.

Accessing asset data

By clicking on any element (or Asset) a dialog box will appear with a collection of all the available data stored in H2know-How.


  1. The primary information set available to the user - presented in a tab-strip. For information about each tab see the Asset details section.
  2. Certain assets or types of asset are associated with a set of special functions or data-sets. These special functions are available through this menu. See the Special functions section for more information.

Asset details

There are several sets of important information contained within the asset detail dialog. The most important sets of information can be accessed through the main tabs presented in the dialog. Depending on the type of asset, and the availability of data, certain tabs will be available.

The attributes tab displays a grid containing properties related to the asset, and the sources where the attributes have been obtained from. Depending on your account access, you can also edit certain properties through this view.

The trends tab shows time-series trends related to the asset. This tab is generally only available on gauge-type assets, or assets that are part of a model involving time-series analysis. This tab serves as the primary means to access the Charts page.

The results tab displays useful data obtained from a hydraulic/hydrological model under various environmental scenarios and other practical constraints (e.g. population growth).

The street-view tab utilizes Google's street-view technology to allow the user to view the area surrounding an asset. This tab is generally only available if the asset is near a compatible road.

The notes & attachments tab allows users to create/attach/view notes and other media associated with the asset depending on their account access. This feature is available on all asset types. For detailed information on using this functionality, see the Notes & Attachments article.

Special functions

Certain assets or types of asset are associated with a set of special functions or data-sets. These special functions are available through the menu located in the top right corner of the asset detail dialog. Specialized functions and data views can be made available on request. Listed below are some of the most popular asset extensions currently available on the H2knOw-how platform.

The data summary function summaries Trade-waste data associated with a consent-type asset, or another chemical sampling point.

The edit feature function allows users to edit special meta-data associated with an asset in certain project types.

Form results show the results collected on the field through the H2knOw-how mobile forms application, as soon as they are collected.

The pipe break function is available in certain modelling projects - this function simulates a scenario where the selected pipe asset breaks, showing which parts of the network are affected and to what degree. Multiple assets can be selected for 'pipe-break' simultaneously.

Users belonging to administration accounts are able to delete the selected asset from the H2knOw-how database.