We frequently update the Polish model as new input data (e.g. elevation data) become available. However, today we are releasing a particularly exciting new update of our Polish setup. We have produced a national set of so-called hydrological corrections for all of Poland, and we have also added a national land cover map - both based on GuGiK BDOT10k data.

Hydrological corrections

Hydrological corrections make it possible to model water that flows under objects like bridges that otherwise appear as barriers in the elevation model. 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. Our hydrological corrections should result in improved flow routing in many places in the country, particularly where bridges and underpasses intersect flow paths.

If you want to learn more about how the corrections were generated, please consult the corresponding section in the documentation. The hydrological corrections are used in our analyses and are automatically included in newly created workspaces where they can be altered if need be.

National land cover data

We have built a national land cover layer from BDOT10k. This means you will now get information about the land cover composition of any watershed you select using the watershed tool. Additionally, you can easily add infiltration to Flash Flood Maps in your workspaces by picking different runoff functions for the various land use categories. Not happy with our land cover map? You can edit it freely using our powerful edit tools in workspaces.

For more information about adding infiltration to your Flash Flood Map, and about editing land cover data, please consult our recent release notes on the subject.

We frequently update the Norwegian model as new input data (e.g. elevation data) become available. However, today we are releasing a particularly exciting new update of our Norway setup. We have produced a national set of so-called hydrological corrections for all of Norway. These corrections should result in improved flow routing in many places in the country, particularly where bridges and underpasses intersect flow paths.

What are hydrological corrections?

Hydrological corrections make it possible to model water that flows under objects like bridges that otherwise appear as barriers in the elevation model. 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.

If you want to learn more about how the corrections were generated, please consult the corresponding section in the documentation. The hydrological corrections are used in our analyses and are automatically included in newly created workspaces where they can be altered if need be.

We have released an update to our high-resolution impervious surface mapping for Denmark. The mapping is now based on data from 2020, a significant update to the previous mapping, released last year, that was based on data from 2014-2016. Besides being based on more recent data, we have also updated our methods to create an even better impervious surface mapping.

It is also used in newly created workspaces. In workspaces you can update your land use mapping to fit your particular project, using our new land use edit tools.

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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.

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.

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

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.

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).

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.

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.

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.

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.

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.

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:

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.

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.

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