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3 rows where breadcrumbs = "["SpatiaLite"]", breadcrumbs contains "SpatiaLite" and references = "[]"
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| id ▼ | page | ref | title | content | breadcrumbs | references |
|---|---|---|---|---|---|---|
| spatialite:querying-polygons-using-within | spatialite | querying-polygons-using-within | Querying polygons using within() | The within() SQL function can be used to check if a point is within a geometry: select name from places where within(GeomFromText('POINT(-3.1724366 51.4704448)'), places.geom); The GeomFromText() function takes a string of well-known text. Note that the order used here is longitude then latitude . To run that same within() query in a way that benefits from the spatial index, use the following: select name from places where within(GeomFromText('POINT(-3.1724366 51.4704448)'), places.geom) and rowid in ( SELECT pkid FROM idx_places_geom where xmin < -3.1724366 and xmax > -3.1724366 and ymin < 51.4704448 and ymax > 51.4704448 ); | ["SpatiaLite"] | [] |
| spatialite:spatial-indexing-latitude-longitude-columns | spatialite | spatial-indexing-latitude-longitude-columns | Spatial indexing latitude/longitude columns | Here's a recipe for taking a table with existing latitude and longitude columns, adding a SpatiaLite POINT geometry column to that table, populating the new column and then populating a spatial index: import sqlite3 conn = sqlite3.connect("museums.db") # Lead the spatialite extension: conn.enable_load_extension(True) conn.load_extension("/usr/local/lib/mod_spatialite.dylib") # Initialize spatial metadata for this database: conn.execute("select InitSpatialMetadata(1)") # Add a geometry column called point_geom to our museums table: conn.execute( "SELECT AddGeometryColumn('museums', 'point_geom', 4326, 'POINT', 2);" ) # Now update that geometry column with the lat/lon points conn.execute( """ UPDATE museums SET point_geom = GeomFromText('POINT('||"longitude"||' '||"latitude"||')',4326); """ ) # Now add a spatial index to that column conn.execute( 'select CreateSpatialIndex("museums", "point_geom");' ) # If you don't commit your changes will not be persisted: conn.commit() conn.close() | ["SpatiaLite"] | [] |
| spatialite:spatialite-installation | spatialite | spatialite-installation | Installation | ["SpatiaLite"] | [] |
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CREATE TABLE [sections] ( [id] TEXT PRIMARY KEY, [page] TEXT, [ref] TEXT, [title] TEXT, [content] TEXT, [breadcrumbs] TEXT, [references] TEXT );