SCALGO Live Documentation

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What's new: National hydrological corrections and updated local data for Finland

Jul 4, 2021

We have released a significant upgrade to the Finnish model in SCALGO Live. We have included new elevation data for Helsinki and Lahti, and we have produced hydrological corrections for the entire country which we have used in the analysis.

Hydrological corrections

Hydrological corrections make it possible to model water that flows through supposed obstacles in the elevation model that actually allow water to flow in reality. For instance, when a stream crosses a road under a bridge, the elevation model could make it look like there is a blockade since the space under the bridge is not represented.

Hydrological corrections shown in green for an area around a freeway east of Nupuri, Finland.

We treat hydrological corrections as logical structures that allow water to flow from one end to the other, they typically do not alter the elevation model itself. Thus, waterways can cross in SCALGO Live — a very powerful feature. For instance, water can flow on top of a bridge in the direction of the road, and at the same time a river can cross the road under the bridge in a different direction. Hydrological corrections have infinite transport capacity, we do not model flooding from e.g. under-dimensioned culverts and bridge openings.

When you create a workspace, the hydrological corrections are included automatically, unless you create a model from a custom DEM or through the "Existing model" feature — in that case you can choose to import corrections directly from the workspace itself.

Updated elevation data for Helsinki and Lahti

For the areas around Helsinki and Lahti, we now use elevation models with a horizontal resolution of 1 meter made available for SCALGO Live users by the respective municipalities. This provides a substantial lift in data quality for users in those areas. In order to incorporate these models, we now represent the whole country in a 1 m model instead of a 2 m model. This also holds for workspaces created from this point onwards.

The elevation model for Finland in the previous 2 m version and the new 1 m model around the Ursa Observatory in Helsinki.

You can see the coverage of the new models in the sources layer in SCALGO Live:

The various sources of elevation data in Finland. The purple and pink areas in the south indicate the coverage area of the new Lahti and Helsinki models. For more information on the sources of the elevation data in Finland, please consult the documentation.

What's new: Fast and intuitive tools to work with infiltration and land use

Jun 24, 2021

We have introduced a whole new set of fast and intuitive tools to work with infiltration and land use in SCALGO Live. With these tools you can easily define runoff functions and initial losses for different land use types and change land use in your project area to describe planned developments. This helps you get an even better understanding of how surface water may affect your project.
To learn more about these new tools, you can read the manual and you can watch our getting started video that shows the details of how to edit land use, define runoff and see the effect of infiltration.

What's new: Improvements to vector imports and exports

Apr 23, 2021

We have introduced a number of new options for working with vector data in SCALGO Live.

Better support for import vector formats

We have expanded our support for vector formats when importing data into SCALGO Live, both for visualizing vector data on the map, and for creating new terrain features. In addition to GeoJSON and Shapefile we now also support MapInfo TAB, GeoPackage and DXF. Since the DXF format is not georeferenced, you will have to select a coordinate system when you import the file. Having issues with any of these formats? Write to support and let us know.

Get three-dimensional geometry from profile window

We have added the option of exporting the data in the profile window as three-dimensional polylines. For example, if you export an elevation profile you will get a polyline with the x,y coordinates following the position of the query path and z being the elevation. If you have multiple profiles in your window you will get a separate polyline for each profile. You can still choose to download the profile information in tabular form where we support CSV and the Excel spreadsheet format (xlsx).

Exporting a three-dimensional polyline from the profile tool.

Improved download of terrain edits and query data

You can now download workspace terrain edits in the same way as you would download from other layers in SCALGO Live. First you draw a boundary around the features you want to download using the download tool, and then you click the green icon to the left of the Terrain Edits layer. You then have the option of selecting the file format and projection for the downloaded features. As part of this change the "Export features" action in the workspace menu has been removed.

We have also added format and projection selection options for the remaining vector exports in SCALGO Live. Most notably this includes depression queries in the depression map, and watersheds exported through the watershed tool.

Downloading the watershed of the Osa tributary of the Vistula in Poland as a GeoPackage.


What's new: National Danish groundwater model

Apr 16, 2021

We have added new Danish national groundwater maps from "Hydrologisk Informations- og Prognosesystem" (HIP) in SCALGO Live. The new layers are integrated with our existing tools to create a powerful way to understand both surface water and shallow groundwater in one place. You can see the groundwater table in our profile tool and filter the groundwater maps based on depth, return period or frequencies. You can also easily understand and get information about the measurement points used the production of the HIP model.

The new layers are available from the library, and all the data can downloaded easily through our regular download system.

The map is showing the places where the groundwater is within 2m of the surface in the winter situation along with some measurement points. The profile window shows the elevation model used in the groundwater model (red line) as well as the groundwater table in the model (black line).

What's new: New Sweden high-resolution model

Apr 15, 2021

We released a significant upgrade to the Swedish elevation model in SCALGO Live. The new model is Lantmäteriets 1m-resolution Markhöjdmodell Nedladdning, grid 1+ which is based on Laserdata NH and Laserdata Skog. As part of this update we have also added additional corrections along rivers and longer subsurface pipes to the set of conservative corrections used in the national model. Laserdata Skog is continuously updated and thus also Markhöjdmodell Nedladdning, grid 1+ . We will regularly update the elevation model in SCALGO Live to ensure you also benefit from these updates.

Comparing the new and the previous model for an area south of Kungsbacka. In this location the model reflects both that the elevation is from a more recent date and the updated resolution is also clear from the drainage channels south of the road.

We have switched the base map used for showing orthophotos and as a consequence of this, orthophotos can now be downloaded in the same way as most other layers in SCALGO Live. If you want an orthophoto for your report you might still be better off using our export map tool that will give you a georeferenced PDF that is of reasonable size.

The sea-level rise analysis has also been updated and now includes the ability to use a depth filter. The depth filter allows you to hide flooded areas where the water depth is lower than a threshold. This is now also available in workspaces.

What's new: New powerful depression map and more analyses visualization options

Mar 29, 2021

SCALGO Live's depression map allows you to investigate the depressions in the terrain and has just become much more powerful. You can now use new volume and area sliders to hide small depressions and focus on the bigger ones. Furthermore, the default rendering style has been changed to a hatched pattern that makes it easier to distinguish between inside and outside of a depression.

Top: The depression map showing all depressions of the terrain. Bottom: Showing only those depressions with a volume larger than 100 cubic metres and an area larger than 0.1 hectares.

But that's not all, several other interesting features have been added to the depression map:

  • On point queries you now get the area of the maximal depression and the area of the selected region as well.
  • You can download the map as both an area and volume raster, and as depression polygons annotated with area and volume.
  • The profile tool now shows depressions too.
  • A banded rendering style is now supported - more on that below. You can use either volume or area to define the bands.
  • We now support volume and area contours, allowing you to easily find areas in a depression with a particular capacity.

Some of these features are shown here:

The depression map displayed in the profile window. The blue sections on the map and profile window correspond to the region selected by the point query on the map. Furthermore we are showing volume contours, rendered as black outlines inside the depressions. In this case, the volume contours delineate regions with a volume of at least 900 cubic metres. This value is set by the slider.

Banded styles for all analyses

We now support banded rendering styles for all analysis layers. Banded rendering allows you to color the analysis layers in three color bands defined by two threshold values on water depth or event. Previously this was possible only for the flash flood map. Furthermore we have tweaked the colour palette to get a nicer looking output. We have also created a colorful slider to help you set the right threshold values.

Green, yellow and red colors show the areas under water in a 3 m sea-level rise of Gdańsk in Poland. The green areas flood once the water reaches 2 to 3 m, the yellow when the water is between 1 m and 2 m, and the red ones are places that are flooded when the sea-level has risen at least 1 m.

What's new: Introducing Modelspaces: Get your hydrodynamic models into SCALGO Live

Mar 18, 2021

With SCALGO Live modelspaces you can now import your hydrodynamic models into SCALGO Live where the simulation results come to life through advanced visualisation, interactive exploration and easy sharing with colleagues, clients and consultants.

A Modelspace rendering a flux layer along with velocity arrows for a particular timestep in the simulation.

You can read more about Modelspaces on the add-on page or get the details in the documentation.

What's new: Use case videos

Mar 9, 2021

We have made new learning material that demonstrates how you can approach different projects based on concrete use cases. These new use-case videos cover a wide range of topics and demonstrate how the tools in SCALGO Live can be used for different purposes. The videos will give you inspiration about out what projects are possible with SCALGO Live, and provide you with guidance on how to carry them out.

Some of the use case videos available.

Just getting started with SCALGO Live? We also have a number of getting started videos that can help you with the basics.

Links to the use case and getting started videos are available from the Help menu inside SCALGO Live.

What's new: Access a EA flood maps inside SCALGO Live

Mar 4, 2021

By popular demand we have made some of the Environment Agency flood risk assessment maps and flood zone maps for England available directly in SCALGO Live.

Flood maps for planning

From the flood maps for planning service we have added the following layers:

  • Areas benefiting from flood defence
  • Flood defence
  • Flood storage area
  • Flood zone 2
  • Flood zone 3
  • Main rivers
EA Flood zones and associated information inside SCALGO Live

Flood warning information service

From the flood warning information service we have added depth and speed layers for the low, medium and high risk rainfall scenarios corresponding to return periods of 30, 100 and 1000 years. To make this easily accessible inside SCALGO Live we have created a slider that allows you to quickly navigate between the return periods. We have also given you filters on water depth and velocity so you can focus on areas with a certain minimum water depth or velocity.

Flood and depth layer for a 1000 year event.

All the new layers are available from the library.

What's new: Improved map export

Mar 1, 2021

We have improved our system for exporting SCALGO Live maps to images as JPG and georeferenced PDFs. The new system is significantly faster than the old system and does a better job at determining an appropriate size for dialogs in the output, including the legend. By popular demand, we now also include vector data that you have dragged into SCALGO Live for visualisation in the exported document.

A JPG exported from SCALGO Live.

Try it out and don't hesitate to let us know what you think.

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