Creating Interactive Maps with Kepler.gl in Snowflake Using Dekart

[delfrrr]

This guide will help you create interactive maps directly within Snowflake using Kepler.gl, powered by Dekart Snowpark Application.

[sfc-gh-obielov]

Should it be something like this?

with uk_boundary as (SELECT GEOMETRY
FROM OVERTURE_MAPS__DIVISIONS.CARTO.DIVISION_AREA
WHERE COUNTRY = 'GB' AND SUBTYPE = 'country')
SELECT ST_ASWKT(s.GEOMETRY) AS GEOMETRY_WKT, s.NAMES, s.ID
FROM OVERTURE_MAPS__TRANSPORTATION.CARTO.SEGMENT s, uk_boundary ub
WHERE ST_INTERSECTS(ub.GEOMETRY, s.GEOMETRY) AND s.CLASS IN ('motorway', 'trunk');

[delfrrr]

Perhaps it was not clear that it's part of the query, not complete one. I will update.

[sfc-gh-obielov]

It seems the correct name of the app is DEKART__KEPLER_GL_MAPS_INSIDE_SNOWFLAKE

[sfc-gh-obielov]

I'm guessing it should be:

with uk_boundary as (SELECT GEOMETRY
FROM OVERTURE_MAPS__DIVISIONS.CARTO.DIVISION_AREA
WHERE COUNTRY = 'GB' AND SUBTYPE = 'country'),
road_segments as (SELECT s.GEOMETRY, s.NAMES, s.ID
FROM OVERTURE_MAPS__TRANSPORTATION.CARTO.SEGMENT s, uk_boundary ub
WHERE ST_INTERSECTS(ub.GEOMETRY, s.GEOMETRY) AND s.CLASS IN ('motorway', 'trunk')),
charging_stations as (SELECT p.GEOMETRY
FROM OVERTURE_MAPS__PLACES.CARTO.PLACE p, uk_boundary ub
WHERE ST_CONTAINS(ub.GEOMETRY, p.GEOMETRY) AND p.CATEGORIES::TEXT ILIKE '%charging%'),
charging_count AS (
   SELECT r.ID AS road_id, r.NAMES AS road_name, COUNT(cs.GEOMETRY) AS num_charging_stations
   FROM road_segments r
   LEFT JOIN charging_stations cs ON ST_DISTANCE(r.GEOMETRY, cs.GEOMETRY) <= 50000
   GROUP BY r.ID, r.NAMES
)
SELECT r.ID, r.NAMES, ST_ASWKT(r.GEOMETRY) as GEOMETRY, cc.num_charging_stations
FROM road_segments r
JOIN charging_count cc ON r.ID = cc.road_id;

[sfc-gh-obielov]

I'm guessing it should be:

with uk_boundary as (SELECT GEOMETRY
FROM OVERTURE_MAPS__DIVISIONS.CARTO.DIVISION_AREA
WHERE COUNTRY = 'GB' AND SUBTYPE = 'country')
SELECT ST_ASWKT(p.GEOMETRY) GEOMETRY
FROM OVERTURE_MAPS__PLACES.CARTO.PLACE p, uk_boundary ub
WHERE ST_CONTAINS(ub.GEOMETRY, p.GEOMETRY) AND p.CATEGORIES::TEXT ILIKE '%charging%';

[sfc-gh-obielov]

Does customer need to apply some manipulations with UI to get this visualisation? E.g set stroke colour based on the 'num_charging_stations' field and amend the colour map

[delfrrr]

It's covered in Style the Map in Dekart