Latest

This data is provisional*
Middle Tampa Bay
2018-09-21 08:30:00 EST
CO2 439.49 ppm
pHT 7.7614  
Dissolved O2 6.90 mg/l
PAR 1.813 µM/m^2/sec
Pressure 0.335 dBar
Salinity 25.76 PSU
Temperature 22.57 °C
Click a value for 72 hour graph.

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* All data are preliminary or provisional and are subject to revision. The data have not received final approval by the USGS and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

LOBOViz CGI Data Service

The LOBOViz server has a public CGI (Common Gateway Interface) that allows remote clients to request and receive LOBO sensor data via HTTP (Hyper-Text Transfer Protocol). This page describes how to access the CGI and retrieve sensor data.

CGI URL

The LOBOViz data CGI for this server is published at the following URL:

  • http://tampabay.loboviz.com/cgi-bin/nph-data.cgi

CGI Data Query Parameters

Parameters are appended to the URL after a '?' character and are each is subsequently separated by a '&' character.

The following common parameters are supported:

ParameterDescription
min_datefirst day of data query in format [YYYYMMDD]
max_datelast day of data query in format [YYYYMMDD]
ycomma-separated list of measurement names for dependent variable(s)
data_formatrequired to be 'text' for text output

Rather than specific min_date and max_date, there are two alternate date selectors:

ParameterDescription
days=nthe most recent n days from today
newest=nthe most recent n measurements

The following are examples of commonly used measurement names for the 'y=' independent variable list:

NameDescription
co2CO2
oxygendissolved O2
pHTtotal scale pH
parPAR
salinitysalinity
temperaturewater temperature

The names of other measurement items and node identifiers can be found by examining the URL after producing a plot then using the Permalink button. Users with full management access can list all items in the system configuration tools. Note that only one node may be selected per data download.

ParameterDescription
nodesite selection

As mentioned above for measurement names; use the Permalink URL from a plot to determine the numeric site identification for use in the value of a "node=" parameter. Note that unlike data plots which can display multiple sites simultaneously, data download is one site at a time.

CGI Data Result Format

The data are returned as tab-separated text representations of numeric values. The first line of the returned data is a header of tab separated names and units for each data column. Each subsequent line displays local date/time in format [YYYY-MM-DD hh:mm:ss], followed by a numeric value for each requested measurement.

Example

For example, if you want to retrieve salinity and pressure for Feb 4, 2018 to Feb 7, 2018 (inclusive) at the example site the URL would be:

http://tampabay.loboviz.com/cgi-data/nph-data.cgi?node=82&min_date=20180204&max_date=20170207&y=salinity,pressure&data_format=text

Click the above URL to see the tab-separated text data returned by the server.

Another example, the 12 most recent temperature measurements:

http://tampabay.loboviz.com/cgi-data/nph-data.cgi?node=82&newest=12&y=temperature&data_format=text

Scripted Usage

Any programming language with HTTP support can be used to directly access the LOBO data CGI and process the returned sensor measurements. Alternately, an HTTP utility such as wget can be invoked to retrieve the data and save to local file for later processing.