Dear All, Good evening.
Here is our assessment of air quality during the 4 lockdown periods. http://urbanemissions.info/blog-pieces/india-airquality-covid19/ City averages through the periods for all the pollutants is downloadable. If you are looking for raw monitoring data, main site is this https://app.cpcbccr.com/ccr/#/caaqm-dashboard-all/caaqm-landing Use the advanced search option to download the data by city and station. This is a cumbersome process and there are some limitations on the number of days you can request in a single search, depending on the time step you choose (1hr or 2hr averages can be longer periods as compared to 15 mins average). Best is 15 mins, which allows for cleaning the data; otherwise if you ask for a day average, the program will give you a value averaging everything it has, which includes negative numbers and some unexplainable numbers like 999's. This is Air Quality (AQ) data and NOT Air Quality Index (AQI) Alternatively, you can access the official data at Openaq.org, which stores last 90 days of data to access via API One way is to search by city name https://api.openaq.org/v1/measurements?city=Ahmedabad¶meter=pm25&date_from=2020-04-01&date_to=2020-04-10&format=csv Ahmedabad has only one site, as of 2020. The Second way is to search by radius method (in km), which will give stations in and around Ahmedabad, including Gandhi Nagar. https://api.openaq.org/v1/measurements?coordinates=23,72.6&radius=30000&date_from=2020-04-01&date_to=2020-04-10¶meter=pm25&format=csv All the openaq.org data (up until the last hour) is all stored on aws s3 buckets https://openaq-fetches.s3.amazonaws.com/index.html (click on real time, to access the global csv files) Here is an instructional post - https://medium.com/@openaq/how-in-the-world-do-you-access-air-quality-data-older-than-90-days-on-the-openaq-platform-8562df519ecd There is also an instructional video (with JS language), if you want to dig deeper - https://youtu.be/Tiot877orkU With best wishes, Sarath -- *Dr. Sarath Guttikunda* *http://www.urbanemissions.info <http://www.urbanemissions.info>* *http://www.indiaairquality.info <http://www.indiaairquality.info>* On Sat, Jun 27, 2020 at 6:46 PM Saketha Ramanujam < [email protected]> wrote: > Hello all, > > > I've managed to acquire 24 Hr average AQI data for dates between > 01-01-2020 and 15-06-2020 from 227 monitoring stations out of 231 across > India as listed on > > https://app.cpcbccr.com/ccr/#/caaqm-dashboard-all/caaqm-landing/caaqm-comparison-data > and > have published them here <https://bit.ly/cpcb-jan-july> . > > I'm currently looking at trends of various parameters before and during > various phases of lockdown. Posting this because these datasets might be of > use to those interested. > > I'm also working on tweaking around with a wrapper over the original cpcb > api to make it easy for the datasets to be downloaded. > > > Thanks, > Saketha Ramanujam > > -- > 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]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/datameet/2de06254-ad0f-4905-bb25-5cf1a5013afao%40googlegroups.com > <https://groups.google.com/d/msgid/datameet/2de06254-ad0f-4905-bb25-5cf1a5013afao%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/datameet/CAAj%2BwWr%3Dv21tFSDFKQFaoeO46rSs4WMN1PgzHBD0mmZRTKub8g%40mail.gmail.com.
