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Rahul Chauhan edited this page Aug 12, 2018 · 10 revisions

Welcome to the Support-of-Unit-Of-Measure-conversion-in-istSOS3 wiki!

Installation guide

  1. Clone this Repo. git clone https://github.com/ChristophBerg/postgresql-unit.git

  2. cd postgresql-unit

  3. Change postgresql-server-dev-(10, 9.5 etc.) according to your installation configuration

sudo apt-get install build-essential postgresql-server-dev-10 flex bison
make PG_CONFIG=/usr/lib/postgresql/10/bin/pg_config
sudo make install PG_CONFIG=/usr/lib/postgresql/10/bin/pg_config

  1. For more detail postgresql-unit https://github.com/ChristophBerg/postgresql-unit.

  2. Clone istsos3 main repo. git clone https://github.com/istSOS/istsos3.git download plugins using link plugins link. extract plugins and paste in istsos3/istsos/plugins ===================== OR ===================== Clone istsos3 forked repo. git clone git@github.com:rahulworld/istsos3.git Note: for both process need to follow istsos3 installation guide. ===================== OR ===================== Directly clone istsos3 testing repo. git clone https://github.com/rahulworld/Support-of-Unit-Of-Measure-conversion-in-istSOS3

  3. Install istsos3 Using main repo. documentation https://github.com/rahulworld/istsos3/blob/master/README.md .

  4. cd istsos3

  5. Start server using python examples/server_tornado.py

  6. Install Postman for Post request easily https://www.getpostman.com/.

  7. listen at http://localhost:8887/rest in Postman.

  8. Insert sensor with one observable property sensor in istsos3 using http://istsos.org/en/v3.0.0-Beta/index.html OR

{
    "action": "CREATE_SENSOR",
    "data": {
        "name": "belin",
        "fixed": true,
        "procedure": "belin",
        "procedure_description_format": ["http://www.opengis.net/sensorML/1.0.1"],
        "observable_properties": [
            {
                "name": "temperature",
                "definition": "urn:ogc:def:parameter:x-istsos:1.0:temperature",
                "uom": "°C",
                "type": "http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement"
            }
        ],
        "observation_types": [
            "http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement"
        ],
        "foi_type": "http://www.opengis.net/def/samplingFeatureType/OGC-OM/2.0/SF_SamplingPoint",
        "sampled_foi": {
            "identifier": "belin_foi",
            "name": "belin_foi",
            "type": "http://www.opengis.net/def/samplingFeatureType/OGC-OM/2.0/SF_SamplingPoint",
            "shape": {
                "type": "Point",
                "coordinates": [
                    0.0,
                    0.0,
                    0.0
                ]
            }
        }
    }
}

Insert Observation any valid data like bellinzona with one observable property

{
"action": "INSERT_OBSERVATIONS",
    "data": [{
        "offering": "belin",
        "procedure": "belin",
        "type": "http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement",
        "featureOfInterest": "beline_foi",
        "phenomenonTime": {
            "timeInstant": {
                "instant": "2003-08-05T00:00:00+02:00"
            }
        },
        "resultTime": {
            "timeInstant": {
                "instant": "2003-08-05T00:00:00+02:00"
            }
        },
        "result": 28.3,
        "observedProperty": {
            "name": "temperature",
            "def": "urn:ogc:def:parameter:x-istsos:1.0:temperature",
            "uom": "°C",
            "type": "http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement"
        }
    }]
}

Using PostgreSQL_unit

  1. Fetch Observation of any offering from istsos3 and change in_unit variable according to specific unit below script
  2. in_unit Lookup Table Lookup Table. If you want to define complex unit then you can add units as user defined unit in lookup table for making units conversion easy. istsos3/istsos/plugins/unit_conv_post/lookUpTable.py 
{
    "action": "UNIT_CONVERSION_USING_POSTGRESQL_UNIT",
    "data": {
        "offerings": ["belin"],
        "observedProperties": [
            "urn:ogc:def:parameter:x-istsos:1.0:temperature"
        ],
        "download_file": {
	    	"file_name": "testing3",
	    	"location": "istsos/plugins/unit_con_post/download_file/"
    	},
        "in_unit":"degK",
	    "operation": {
	    	"type":"mul",
	    	"qty": "10",
	    	"unit": "degK"
	    },
	    "responseFormat": "application/json;subtype='array'"
    }
}

Take Data as array, array2, vega and default data format as user specific unit after change subtype above script in responseFormat.

Remember if istsos3 give error there is no unit extension then create manually in istsos3 database in postgresql database using.

create extension unit;

Unit Conversion in other specific units and perform operation with magnitude (addition, subtraction, multiplication and division) in other specific units will work.

Some Specific Units using UNIT_CONVERSION_USING_POSTGRESQL_UNIT action.

Properties types
Temperature °C, °K, °F, °R
Length mm, cm, in, ft, m, km, mi, fathom
Time ns, ms, s, min, h, d, week, month, year
Frequency Hz, mHz, kHz, MHz, GHz, THz, rpm, deg/s, radian/s
Speed mm/s, cm/s, m/s, m/h, in/s, ft/s, mi/h, knot
Area mm^2, cm^2, m^2, ha, km^2, in^2, ft^2, acre, mi^2
Volume mm^3, cm^3, m^3, in^3, ft^3, ml, l, kl, tsp, cup, qt, gal, yd^3
Mass mcg, mg, g, kg, oz, lb, mt, t
Flow mm^3/s, cm^3/s, cl/s, dl/s, ml/s, l/s, l/min/ l/h, kl/s, in^3/s, ft^3/s, tsp/s, cup/s, qt/s, gal/s, gal/min, yd^3/s
Pace s/m, min/m, s/ft, min/km
Storage byte, B, kB, KB, MB, GB, TB
Volumetric Analysis ppm, ppb, ppt
Volt mV, V, kV
Current A, mA, kA
Power mW, W, kW, MW, GW
Energy mWh, Wh, MWh, GWh, J, kJ
Angle deg, radian, arcmin, arcsec
Capacitance pC, nC, μC, mC, C
Force N, kN, lbf
Acceleration gravity, m/s^2

NOTE: For Regional and more units visit

https://github.com/ChristophBerg/postgresql-unit/blob/master/definitions.units.
NOTE:Temprature conversion don't use °C directly in operations because of it behaves difference between temprature as 1 °K so perform operations using °K.

Operations

Addition

{
    "action": "UNIT_CONVERSION_USING_POSTGRESQL_UNIT",
    "data": {
        "offerings": ["belin"],
        "observedProperties": [
            "urn:ogc:def:parameter:x-istsos:1.0:temperature"
        ],
        "in_unit":"°K",
	    "operation": {
	    	"type":"add",
	    	"qty": "10",
	    	"unit": "°K"
	    },
	    "responseFormat": "application/json;subtype='array'"
    }
}
Note: if qty is None it will be 0 (add, sub), 1 (mul, div).

Note: if unit is None it will be default uom.

Case 1: only in_unit exits.
  1. Only unit conversion take place and final uom will be in_unit.
Case 2: in_unit, operation, unit all are exits.
  1. First addition operation perform data.add(qty, unit).
  2. Then unit conversion take place and final uom will be in_unit.
Case 3: only operation, unit are exits.
  1. First addition operation perform data.add(qty, unit).

Subtration

Note operation type : sub only change same as addition.

Multiplication

Note operation type : mul.

Case 1: only in_unit exits.
  1. Only unit conversion take place and final uom will be in_unit.
Case 2: in_unit, operation, unit all are exits.
  1. First multiplication operation perform data.mul(qty, unit).
  2. Then unit conversion take place and final uom will be in_unit * unit.
Case 3: in_unit, operation are exits.
  1. First multiplication operation perform data.mul(qty, in_unit).
  2. Then unit conversion take place and final uom will be in_unit * in_unit.
Case 4: only operation, unit are exits.
  1. Only multiplication take place and final uom will be default_uom * unit.

Division

Note operation type : div only change same as multiplication.

Download CSV after unit conversion and operations

{
    "action": "UNIT_CONVERSION_USING_POSTGRESQL_UNIT",
    "data": {
        "offerings": ["belin"],
        "observedProperties": [
            "urn:ogc:def:parameter:x-istsos:1.0:temperature"
        ],
        "download_file": {
	    	"file_name": "testing3",
	    	"location": "istsos/plugins/unit_con_post/download_file/"
    	},
        "in_unit":"°K",
	    "operation": {
	    	"type":"mul",
	    	"qty": "10",
	    	"unit": "°F"
	    },
	    "responseFormat": "application/json;subtype='array'"
    }
}

Download

CSV file download after unit conversion and operations in files with all meta data and converted uom.
  • file_name not exits then file_name will be default offering.
  • location not exits then will be download on istsos3 root folder.

Using Pint

  1. Fetch Observation of any offering from istsos3 and change in_unit variable according to specific unit below script
  2. in_unit Lookup Table Lookup Table. If you want to define complex unit then you can add units as user defined unit in lookup table for making units conversion easy. istsos3/istsos/plugins/unit_conv_pint/lookUpTable.py

Note: Temprature conversion don’t use degC directly in operations because of it behaves difference between temprature as 1 °K so perform operations using °K.

Installation

sudo pip3 install pint

Use this post script for pint only for array type data.

{
    "action": "UNIT_CONVERSION_USING_PINT",
    "data": {
        "offerings": ["belin"],
        "observedProperties": [
            "urn:ogc:def:parameter:x-istsos:1.0:temperature"
        ],
        "download_file": {
	    	"file_name": "pint1",
	    	"location": "istsos/plugins/unit_con_post/download_file/"
    	},
    	"operation": {
	    	"type":"mul",
	    	"qty": "1",
	    	"unit": "degK"
	    },
        "responseFormat": "application/json;subtype='array'",
        "in_unit":"degK"
    }
}

Some Specific Units using UNIT_CONVERSION_USING_PINT action.

Properties types
Temperature degC, degK, degF, degR
Length mm, cm, in, ft, m, km, mi, fathom
Time ns, ms, s, min, hour, day, week, month, year
Frequency Hz, mHz, kHz, MHz, GHz, THz, rpm, deg/s, rad/s
Speed mm/s, cm/s, m/s, m/h, in/s, ft/s, mi/h, knot
Area mm^2, cm^2, m^2, ha, km^2, in^2, ft^2, acre, mi^2
Volume mm^3, cm^3, m^3, in^3, ft^3, ml, l, kl, tsp, cup, qt, gal, yd^3
Mass mg, g, kg, oz, lb, mt, t
Flow mm^3/s, cm^3/s, cl/s, dl/s, ml/s, l/s, l/min/ l/h, kl/s, in^3/s, ft^3/s, tsp/s, cup/s, qt/s, gal/s, gal/min, yd^3/s
Pace s/m, min/m, s/ft, min/km
Storage bit, byte, B, kB, MB, GB, TB
Volt mV, V, kV
Current A, mA, kA
Power mW, W, kW, MW, GW
Energy mWh, Wh, MWh, GWh, J, kJ
Angle deg, radian, arcmin, arcsec
Capacitance pC, nC, μC, mC, C
Force N, kN, lbf
Acceleration gravity, m/s^2

NOTE: For Regional and more units visit

https://github.com/hgrecco/pint/blob/master/pint/default_en.txt.

NOTE: All procedure for pint action UNIT_CONVERSION_USING_PINT is same as action UNIT_CONVERSION_USING_POSTGRESQL_UNIT.

Take Data as array format as user specific unit after change subtype above script in responseFormat.

Thank You

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