I went through it last night. They did use the readings from DPCC stations in Delhi for the analysis, but they are missing from the portal.
Also check out what the US consulate has to say about Indian pollution http://mumbai.usconsulate.gov/airqualitydata.html US EPA has a different method for AQI and the aqi doc compares all of these. The data being made available on the portal is for every hour. DPCC makes it available every 15 minutes. These people are averaging or toying with data somewhere at the raw source itself. Regards, Srinivas Kodali On Wed, Apr 8, 2015 at 12:56 PM, Thejesh GN <[email protected]> wrote: > I found the document "National Air Quality Index - Book" > > which explains how/what parameters are used to calculate AQI > > > https://www.documentcloud.org/documents/1762477-national-air-quality-index-aqi-final-book.html > > Thej > -- > Thejesh GN *⏚* ತೇಜೇಶ್ ಜಿ.ಎನ್ > http://thejeshgn.com > GPG ID : 0xBFFC8DD3C06DD6B0 > > On 8 April 2015 at 07:58, Thejesh GN <[email protected]> wrote: > >> Is there a document on how this specific AQI is calculated? >> >> Thej >> -- >> Thejesh GN *⏚* ತೇಜೇಶ್ ಜಿ.ಎನ್ >> http://thejeshgn.com >> GPG ID : 0xBFFC8DD3C06DD6B0 >> >> On 8 April 2015 at 06:27, Eric Dodge <[email protected]> wrote: >> >>> A couple other points to add to the discussion: >>> >>> The color of the map dots doesn't correspond to the AQI level displayed >>> when you click on the station. >>> >>> The color scale for PM2.5 is absurd. The WHO limit for PM2.5 is 10 but >>> values up to 100 are being shown as green on this visualization. >>> >>> Eric >>> >>> On Wed, Apr 8, 2015 at 2:31 AM, srinivas kodali <[email protected]> >>> wrote: >>> >>>> Hi All, >>>> >>>> Here is the website for the National Air Quality Index. A simple made >>>> to look good website http://aqi.iitk.ac.in:9000/# >>>> >>>> Play with it once. There is a air quality monitoring station in IIT >>>> Madras, the most greenest and least polluting part of Chennai. How can you >>>> compare that to chennai`s pollution when your sample itself is biased? >>>> >>>> Delhi the stations seem different from that of Delhi Pollution Control >>>> Committee http://www.dpccairdata.com/dpccairdata/display/index.php , >>>> For example RK Puram and IGI Airport stations are visible no where. >>>> >>>> Someone from each city please have a look at the station location in >>>> your city. I feel they are not spatially varied in the right way. >>>> Like in Ahmedabad, the only station is near kankaria lake. I believe >>>> it`s old city, correct me if I am wrong. >>>> >>>> I feel all of this is more of a college project than a actual national >>>> project. The sensors being used to measure these readings are also not >>>> known. >>>> >>>> @thej: Can we compare banglore data with the data you generate through >>>> your network and also other sensors placed in banglore? I feel the JP Nagar >>>> station is from the office of fields of view >>>> >>>> @harsha: I am not sure of the Sanathnagar Station in Hyderabad, the >>>> location seems to be wrong. Will you be able to find out more details >>>> please? >>>> >>>> Regards, >>>> Srinivas Kodali >>>> >>>> -- >>>> Datameet is a community of Data Science enthusiasts in India. Know more >>>> about us by visiting http://datameet.org >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "datameet" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> >> > -- > Datameet is a community of Data Science enthusiasts in India. Know more > about us by visiting http://datameet.org > --- > You received this message because you are subscribed to the Google Groups > "datameet" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- Datameet is a community of Data Science enthusiasts in India. Know more about us by visiting http://datameet.org --- You received this message because you are subscribed to the Google Groups "datameet" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
