Visualizing Environmental Data: Progress Report and Derived Variables
Explore the progress report and derived variables including Fire Risk, Drought Indices, and Thermal Stress. Check out the new features for viewing region-averaged maps and original images averaged by state, country, and division.
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Presentation Transcript
Progress Report 1/1/2019 ~ 1/14/2019 Wei Guo
Felixs Comment/Request [11/13/2018] suggest to present country-mean or province mean map for all VH products.
Solution /working items country-mean or province mean map for all VH products. Need work on the following derived variables: Fire Risk Drought indices Change from last week/year Stress VH Healthy VH Moisture Stress Thermal Stress
New URL Curret URL: https://www.star.nesdis.noaa.gov/smcd/emb/vci/VH/vh_browseVH.php New URL (temporary for testing) https://www.star.nesdis.noaa.gov/smcd/emb/vci/VH_2019_0104/vh_browseVHmean.php The new page has a new checkbox option ( Region Mean ) to show region averaged map , ( averaged by country, province, or division)
VHI Original image Averaged by State
VHI Original image Averaged by country
VHI Original image Averaged by Division
VCI Original image Averaged by Division
TCI Original image Averaged by Division
SMN Original image Averaged by Division
SMT Original image Averaged by Division
VH change from last week Original image Averaged by Division Most of division Is white?
VH change from last year Original image Averaged by Division
Fire Risk Original image Averaged by Division
Healthy Vegetation Healthy Vegetation Original image Averaged by Division ? Input is VHI, Average by Division will result in meanVHI <55 (white),
Stressed And Healthy Vegetation Stressed And Healthy Vegetation Original image Averaged by Division Input is VHI, Average by Division Need revise.
Moisture Stress Moisture Stress Original image Averaged by Division Input is VHI, Average by Division need revise
Thermal Stress Thermal Stress Original image Averaged by Division
Malaria Risk Map Malaria Risk Map Original image Averaged by Division
Change in Moderate Change in Moderate- -to to- -Exceptional Change In 1 Week Change In 1 Week Exceptional Drought Drought Original image Averaged by Division ?
Tuned the PHP code to improve the 1km on- fly images masked by snow Snow mask override the desert mask
Improved the 3 web pages using plotly Improved the 3 web pages using plotly to show time series. (vh_provinceTimeSeries.php, vh_countryMeanTimeseries.php, vh_targetTimeseries.php) Removed the mode Bar , which may come up when mouse move over the figure, sometimes it is very annoying. Made background of legend as transparent so that it does not block the lines. Adjusted the position of axis so that all border lines are displayed.
Wenzes idea on region-averaged Fire Risk map Wenze s suggestion (copy from his email on 1/10/2019): It might be worth to derive such a value of fire risk expect (FRE) at a country/province/division range: 1) found the percentage of area (P_FR) with fire risk 0-5 (if great than 5, just assign as 5), then 2) calculate FR times P_FR, and 3) add them together. Thus FRE = sum(FR * P_FR), FR=0, 1, ... 5 Revised version on above suggestion: In order to get value as the same meaning as original risk index, suggest use ratio_of_Area (= percentage_of_area /100), FireRisk = sum( risk_level * ratio_of_Area) Current plan FireRisk = mean( risk_level_at_each_pixel) Where, risk_level =0,1, 5 Thus, current plan is the same as revised version of Wenze s plan: FireRisk = mean( risk_level_at_each_pixel) = sum ( risk_level *Npixels_at_this level) /total_pixels = sum( risk_level * ratio_of_Area)
