Joel M jmasselink

## gfw_alerts_to_csv.py
# derived from a question to ChatGPT
# How could I use Python code to derive a CSV with 4 fields: longitude, latitude, date, and confidence level from a raster which has the following encoding/syntax?:
# Each pixel (alert) encodes the date of disturbance and confidence level in one integer value. The leading integer of the decimal representation is 2 for a low-confidence alert, 3 for a high-confidence alert, and 4 for an alert detected by multiple alert systems, followed by the number of days since December 31, 2014. 0 is the no-data value. For example:
# 20001 is a low confidence alert on January 1st, 2015
# 30055 is a high confidence alert on February 24, 2015
# 21847 is a low confidence alert on January 21, 2020
# 41847 is a highest confidence alert (detected by multiple alert systems) on January 21, 2020. Alert date represents the earliest detection
# 0 represents no alert

import rasterio

## GHA_adm1_regions.geojson

      
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                jmasselink
                / GHA_adm1_regions.geojson
            
            
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              September 7, 2022 20:08
            
              
                Ghana admin 1 level boundaries (16 regions)
              
          
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## Okapi_Wildlife_Reserve.geojson

      
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              October 4, 2019 18:32
            
              
                Okapi Wildlife Reserve extracted from World Database for Protected Areas
              
          
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## Oku_Riv_DRC.geojson

      
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              August 9, 2019 19:40
            
          
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## PCT_overpass.geojson

      
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              June 10, 2019 15:35
            
              
                PCT export from Overpass API
              
          
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## PCT_overpass.geojson

      
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              June 10, 2019 15:33
            
          
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## .block
license: mit

## .block
license: mit

## .block
license: mit

## .block
license: mit
	# derived from a question to ChatGPT
	# How could I use Python code to derive a CSV with 4 fields: longitude, latitude, date, and confidence level from a raster which has the following encoding/syntax?:
	# Each pixel (alert) encodes the date of disturbance and confidence level in one integer value. The leading integer of the decimal representation is 2 for a low-confidence alert, 3 for a high-confidence alert, and 4 for an alert detected by multiple alert systems, followed by the number of days since December 31, 2014. 0 is the no-data value. For example:
	# 20001 is a low confidence alert on January 1st, 2015
	# 30055 is a high confidence alert on February 24, 2015
	# 21847 is a low confidence alert on January 21, 2020
	# 41847 is a highest confidence alert (detected by multiple alert systems) on January 21, 2020. Alert date represents the earliest detection
	# 0 represents no alert

	import rasterio