Feature/issue 85 - Add variable units to API response

[nikki-t]

Github Issue: #85

Description

Add variable units to API response.

Overview of work done

Parsed units from DynamoDB query results and added them to the GeoPandas GeoDataFrame object which includes the units in the API response.

Note that units are present for each feature in the FeatureCollection GeoJSON response.

Overview of verification done

Updated existing GeoJSON and CSV unit tests to include units. Created a new unit test to test the add_units function which matches use specified fields with units. All units test pass.

Overview of integration done

Deployed modifications to SIT environment and ran the following queries.

Normal Execution (GeoJSON)

curl --location --request GET 'https://soto.podaac.sit.earthdatacloud.nasa.gov/hydrocron/v1/timeseries?feature=Reach&feature_id=85206000551&output=geojson&start_time=2023-11-22T00:00:00Z&end_time=2024-03-15T00:00:00Z&fields=reach_id,time_str,width,wse,slope'

{
    "status": "200 OK",
    "time": 462.435,
    "hits": 1,
    "results": {
        "csv": "",
        "geojson": {
            "type": "FeatureCollection",
            "features": [
                {
                    "id": "0",
                    "type": "Feature",
                    "properties": {
                        "reach_id": "85206000551",
                        "time_str": "no_data",
                        "width": "-999999999999.0",
                        "wse": "-999999999999.0",
                        "slope": "-999999999999.0",
                        "width_units": "m",
                        "wse_units": "m",
                        "slope_units": "m/m"
                    },
                    "geometry": {
                        "type": "LineString",
                        "coordinates": [
                            [
                                -71.041492,
                                68.422154
                            ]
                        ]
                    }
                }
            ]
        }
    }
}

(coordinates values trimmed to preserve space)

Normal Execution (CSV)

curl --location --request GET 'https://soto.podaac.sit.earthdatacloud.nasa.gov/hydrocron/v1/timeseries?feature=Reach&feature_id=85206000551&output=csv&start_time=2023-11-22T00:00:00Z&end_time=2024-03-15T00:00:00Z&fields=reach_id,time_str,width,wse,slope'

{
    "status": "200 OK",
    "time": 595.052,
    "hits": 1,
    "results": {
        "csv": "reach_id,time_str,width,wse,slope,width_units,wse_units,slope_units\n85206000551,no_data,-999999999999.0,-999999999999.0,-999999999999.0,m,m,m/m\n",
        "geojson": {}
    }
}

PR checklist:

• Linted
• Updated unit tests
• Updated changelog
• Integration testing

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