Terrain: Difference between revisions

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{{learned|what land is|what the relationship is between land and terrain in the {{software}}|which types of land type are present in the {{software}}|how to edit the land of a selected area}}
{{learned|the meaning of terrain in the {{software}}|about the relationship between land and terrain in the {{software}}|which terrain types are present in the {{software}}|how to edit the land of a selected area}}


==What is Terrain?==
==What is meant by Terrain?==
Terrain in the {{software}}, describes the surface, subsurface and elevation of your project. Terrain excludes everything which is build-up on the terrain, which is described in buildings. Terrain can be edited via GEO DATA -> Terrain.
The {{software}} uses the term ''terrain'' to describe the composition of the surface, subsurface and their elevation in a project. This does not include anything built upon it, which falls under the term ''buildings''. Within the Editor the terrain in a project can be accessed from the ribbon tab Current Situation → Terrain.


==Surface==
==Surface==
In the {{software}} there are different terrain types are available. Each land type has different predefined attributes that affect [[indicators]] and [[Overlay|overlays]] such as [[Green (Indicator)|green]], [[Livability (Indicator)|livability]] and the [[Rainfall_(Overlay)|rainfall flooding]]. All types are described in the table below.
The {{software}} differentiates between various types of terrain. Each terrain type has its own predefined attributes that may have an effect on various [[indicators]] and [[Overlay|overlays]], such as [[Green (Indicator)|green]], [[Livability (Indicator)|livability]] and [[Rainfall_(Overlay)|rainfall flooding]]. A description of all available terrain types is listed in the table below.


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|Concrete
|Concrete
|Beton
|Beton
|This land type can mostly be found in urban and industrial areas
|Commonly found in urban and industrial areas.
|-
|-
|River Water
|River water
|Boezemwater
|Boezemwater
|Larger water bodies, navigable for (small) boats
|Larger water body, navigable for (small) boats.
|-
|-
|Dike
|Dike / Levee
|Dijk
|Dijk
|Dike is a land type that usually lays between water and constructions, or other areas which need to be protected. Dikes are constructed phenomenon, offering protection from floods and high tides
|A construction usually built between a water body and low-lying land (polder) offering protection from flooding.
|-
|-
|Dunes
|Dunes
|Duinen
|Duinen
|Dunes is a land type that usually lays between the beach and the rest of the land mass. Dunes are a natural phenomenon, a row of wind shaped sandy hills, protecting the inland from floods and high tides. Sometimes, due to erosion, dunes also occur inland and can eventually develop into a large arid region - the Sahara sand dunes.
|A naturally occurring landscape feature forming the division between the beach and the hinterland.
|-
|-
|Golf brekers
|Breakwater
|Breakwater
|Breakwater is land type designated to protect the actual coast line from waves, floods and tidal erosion.
|Golfbreker
|A construction designed to protect the coastline from wave action.
|-
|-
|Grassland
|Grasland
|Grasland
|Grassland
|Area dominated by grass vegetation.
|All that is grass
|-
|-
|Open land
|Open land
|Open land
|Open land
|This is the default land type for land in the {{software}}. If an empty world is generated, all land will have this land type
|The default terrain type for land surface. If an empty world is generated, this type will cover the entire map.
|-
|-
|Water
|Water
|Water
|Water
|Small water bodies
|Small water body
|-
|-
|Sand
|Sand
|Zand
|Zand
|All that is sand
|Area largely consisting of sandy sediment.
|}
|}


Each surface terrain-type has the following attributes:
Each surface-terrain type has the following attributes:


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Revision as of 09:43, 12 April 2019

Please note: This page is currently being updated.


Template:Learned

What is meant by Terrain?

The Tygron Platform uses the term terrain to describe the composition of the surface, subsurface and their elevation in a project. This does not include anything built upon it, which falls under the term buildings. Within the Editor the terrain in a project can be accessed from the ribbon tab Current Situation → Terrain.

Surface

The Tygron Platform differentiates between various types of terrain. Each terrain type has its own predefined attributes that may have an effect on various indicators and overlays, such as green, livability and rainfall flooding. A description of all available terrain types is listed in the table below.

EN NL Description
Concrete Beton Commonly found in urban and industrial areas.
River water Boezemwater Larger water body, navigable for (small) boats.
Dike / Levee Dijk A construction usually built between a water body and low-lying land (polder) offering protection from flooding.
Dunes Duinen A naturally occurring landscape feature forming the division between the beach and the hinterland.
Breakwater Golfbreker A construction designed to protect the coastline from wave action.
Grassland Grasland Area dominated by grass vegetation.
Open land Open land The default terrain type for land surface. If an empty world is generated, this type will cover the entire map.
Water Water Small water body
Sand Zand Area largely consisting of sandy sediment.

Each surface-terrain type has the following attributes:

Attribute Unit Description
BUILDABLE Indication if a terrain can be built upon or not.
GROUND_INFILTRATION_MD meter per day Limitation in capacity of ground infiltration from the surface into the sub-soil, used in the Rainfall Overlay
HEAT_EFFECT degrees celsius Impact of terrain on the heat stress overlay
LIVABILITY_EFFECT Impact of terrain on the livability overlay
POLDER_WATER
SAFETY
TERRAIN_MIX
TEXTURE_TYPE
WATER Whether this is a water-type terrain. This means constructions that can only be built on land cannot be built on this terrain. In addition, it also counts as a water terrain for overlay calculations. If 1, cells of this type will average the waterlevel, if 0, surface flow will be computed (see Rainfall Overlay)
WATER_DEPTH_M m When the new project wizard creates a new project, and this is water-type terrain, this is the maximum depth of that water body.
WATER_EVAPORATION_FACTOR Factor by which the reference evaporation (see Rainfall Overlay) is multiplied
WATER_MANNING s/[m1/3] Roughness of the surface, used in the surface flow computation of the Rainfall Overlay.

Subsurface

In the Tygron Platform there are different subsurface types available. Subsurface terrain data is acquired from FGR. Note: as of Tygron Platform version 2019.0.0 this has become BRO. The Subsurface Overlay shows the different soil types composing the subsurface, each having distinctive predefined attributes. The table below shows a division into the different terrain categories, which, in turn, have their own subdivisions into multiple subsurface soil types.

EN NL Description
Gravel Grind Terrain with a gravel underground layer
Clay Klei Terrain with a clay underground layer
Chalk Krijt Terrain with a chalk underground layer
Loam Leem Terrain with a loam underground layer
Loess Löss Terrain with a loess underground layer
Unknown Onbekend Default underground if no data is available for your project
Silt Silt Terrain with a silt underground layer
Peat Veen Terrain with a peat underground layer
Sand Zand Terrain with a sand underground layer
Marine clay Zeeklei Terrain with a marine clay underground layer


Each underground terrain type has the following attributes:

Attribute Unit Description
ANGLE_OF_REPOSE Degrees When the new project wizard creates a new project, and this is water-type terrain, this is the maximum steepness of the sloop at the edges of the water (taludhoek).
BUILDABLE Attribute that determines if a Construction can be built there (0=no, 1=yes)
GROUND_INFILTRATION_MD meter per day Limitation in capacity of ground infiltration from the surface into the sub-soil, used in the Rainfall Overlay
PEAT_FRACTION
TOPLAYER_THICKNESS
WATER_STORAGE_PERCENTAGE Volume of water that can be stored per volume of soil, usually expressed as the saturated minus residual water content properties of soil

Elevation

In the terrain menu, the user can change the elevation-model in the project or import/select an elevation model Geotiff. More info on elevation can be found on the terrain height page

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