raster analytics in arcgis notebooks€¦ · raster analytics in arcgis notebooks internship...
TRANSCRIPT
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RASTER ANALYTICS IN ARCGIS NOTEBOOKS
Internship Project Student : Frida Ruiz Mendoza Supervisor: Thomas Paschke
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• About the project
• ArcGIS Notebooks
• Methods
• Showcase: Simple Change detection in
Bremen
• Tips and tricks (Story Map)
• Recommendations and Future work
CONTENT
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Internship Project
The main objective of this project was to:
“Create a showcase for ArcGIS Notebooks and explore the advantages it offers to
create end-to-end workflows for raster analysis ”
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ArcGIS Notebooks Hosted Jupyter Notebook in your ArcGIS Enterprise portal and powered by the new ArcGIS Notebook Server.
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Earth Observation programme by ESA that aims to provideglobal, continuous, autonomous, high quality.
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Simple change detection for vegetationmonitoring
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METHOD
Different Methods for change detectionCredits : Herlod M, Remote Sensing techniques WUR, 2019
• Image Algebra (Image subtraction method) & Post-classification comparisons
• Commonly done for two points in time
• Straightforward and widely used
First Date Second Date
Differencemap
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ARCGIS API FOR PYTHON
ArcGIS Notebooks
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WORK-FLOW
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Module 1.
1. Understand gis object2. Search for vector data(feature Layer)
3. Query attributes and displayin a table
(Pandas spatial dataFrame)
4. Select single Featuresand create a geometry using
Geometry module
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Module 2. Filter Imagery Layer and query specific dates
• Filters images that intersect study area• Filters images that have certain cloud cover
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Module 3.
Example : Simple change detection in Bremen
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NDVI Classification
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Story Map
https://storymaps.arcgis.com/stories/41ede17ec6754aae81ea87d072902535
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Future work and lessons learned
Improvements : • Script exclusively for Notebooks Interaction
• Scripts only work on ArcGIS API for python 1.6.1 and up(1.6.0 not supported)
• Pie charts only show values interactively not if downloaded
• Improve code cells and make them functions
Lessons learned: • Working with ONE item (image) has no restrictions to calculate pixel
values
• Working with MORE than one item requires understanding ofMosaic_rule and works best when using chained raster functions.
• Imagery Layers have maximum Height and Width -> # of pixels youcan export or make calculations on -> modify pixel_size
• Way of reaching pixel values done by calculating statistics and deriving pixel count per value -> explore working with arrays
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• Straightforward to use the service and quick to filter images
• Convenient to publish Web applications through the Esri Platforms
•API updated often (documentation is tricky)
•Sharing and reproducing your workflow easy
•Integration of both Esri and open source libraries
•User interface from Arcigs Enterprise constantly updated and linked to
Notebooks
CONCLUSIONS
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THANK YOU !
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