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RAM for speed and to SSDs for persistent storage 1 0 SSD or NVRAM STORAGE (L3) 250GB to 20TB 1-2 GB/sec CPU RAM (L2) 32GB to 3TB 70-120 GB/sec GPU RAM (L1) 24GB to 256GB 1000-6000 GB/sec Hot Data Speedup = 1500x to 5000x Over Cold Data Warm Data Speedup = 35x to 120x Over Cold Data Cold Data COMPUTE LAYER STORAGE LAYER Data Lake/Data Warehouse/System Of Record
Lifecycle (Illustrative) Business Analyst Data Scientist Data Engineer IT Systems Admin Data Scientist / Business Analyst Data Preparation Data Discovery & Feature Engineering Model & Validate Predict Operationalize Monitoring & Refinement Evaluate & Decide GPUs
two coordinates POLYGON A set of one or more rings (closed linestrings), with the first representing the shape (external ring) and the rest representing holes in that shape (internal rings) LINESTRING A sequence of 2 or more points and the lines that connect them MULTIPOLYGON A set of one or more polygons
Uses the JavaScript Object Notation (JSON) open data standard for storing geographical features as key-value pairs. ESRI Shapefile Consists of a group of files (.shp, .shx, .dbf etc) that need to be stored in the same directory or part of a zip file. The .shp file contains the feature geometry itself. KML Keyhole Markup Language is based on XML, using tag-based structure with nested elements and attributes to store geographic data. CSV/TSV with WKT Well Known Text (WKT) is a text markup language for representing vector geometry objects on a map.
ST_Distance ST_Contains Returns shortest planar distance between geometries. Returns shortest geodesic distance between geographies (in meters, limited support) . Returns true if first geometry contains the second one.
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