de.hftstuttgart.cityunits
Create Eclipse P2 repository with Ecore data types QuantityDouble and QuantityLong for units based on Indriya reference implementation of Units of Measurement Java specification (JSR 385) and some special units for urban simulation.
To add OSGi bundles published in this P2 repository add site https://transfer.hft-stuttgart.de/pages/neqmodplus/de.hft-stuttgart.cityunits/release_target_102/ to a running Eclipse instance via Eclipse -> Preferences -> Install/Update -> Available Software Sites -> Add... or to a target platform definition via Eclipse -> Preferences -> Plug-in Development -> Target Platform -> Edit....
For an introduction on dealing with units in Java, see Baeldung: Introduction to javax.measure.
Find demos on how to define new dimensions and units, e.g. in the energy domain under github.com/unitsofmeasurement.
Some examples for valid units:
| Symbol | Dimension |
|---|---|
| Hz | 1/[T] |
| Bq | 1/[T] |
| A | [I] |
| F | [I]²·[T]^4/([L]²·[M]) |
| S | [I]²·[T]³/([L]²·[M]) |
| C | [I]·[T] |
| cd | [J] |
| lm | [J] |
| lx | [J]/[L]² |
| m | [L] |
| m/s | [L]/[T] |
| km/h | [L]/[T] |
| m/s² | [L]/[T]² |
| m² | [L]² |
| Sv | [L]²/[T]² |
| Gy | [L]²/[T]² |
| H | [L]²·[M]/([I]²·[T]²) |
| Ω | [L]²·[M]/([I]²·[T]³) |
| Wb | [L]²·[M]/([I]·[T]²) |
| V | [L]²·[M]/([I]·[T]³) |
| J | [L]²·[M]/[T]² |
| W | [L]²·[M]/[T]³ |
| l | [L]³ |
| m³ | [L]³ |
| N | [L]·[M]/[T]² |
| kg | [M] |
| g | [M] |
| T | [M]/([I]·[T]²) |
| Pa | [M]/([L]·[T]²) |
| mol | [N] |
| kat | [N]/[T] |
| h | [T] |
| year | [T] |
| s | [T] |
| day | [T] |
| week | [T] |
| min | [T] |
| K | [Θ] |
| ℃ | [Θ] |
| one | one |
| % | one |
| rad | one |
| sr | one |
Some derived units of special interest for urban simulation like kW·h (encodes kWh) as measure of energy or m³/min as measure of flow rate.
| Symbol | Dimension |
|---|---|
| W·s | [L]²·[M]/[T]² |
| W·h | [L]²·[M]/[T]² |
| kW·h | [L]²·[M]/[T]² |
| MW·h | [L]²·[M]/[T]² |
| m³/min | [L]³/[T] VolumetricFlowRate |
| m³/h | [L]³/[T] VolumetricFlowRate |
| m³/s | [L]³/[T] VolumetricFlowRate |
| m³/d | [L]³/[T] VolumetricFlowRate |
| l/min | [L]³/[T] VolumetricFlowRate |
Some units of special interest for urban simulation introduced with this plug-in:
| Symbol | Dimension |
|---|---|
| W/m² | [M]/[T]³ Intensity |
| ppm | one |
| dB | one |
| gCO₂eq | [M] CarbonEmission |
| kgCO₂eq | [M] CarbonEmission |
| tonCO₂eq | [M] CarbonEmission |
| € | [$] |
| $ | [$] |
Note that monetary units have been added ad hoc to City Units to model costs, but may be abandoned in future.