Animated markers missing when using pre1970 dates in TimestampedGeoJson
Nobody has claimed this yet.
Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 42/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- javascript, python
- Domain
- data-visualization
Research direction
Start at the folium.plugins.TimestampedGeoJson entry point and compare the generated Leaflet.TimeDimension configuration for negative timestamps with the provided post-1970 sample. Reproduce the example, trace how the pre-1970 values reach the animation, and verify that animated markers appear for both timestamp ranges.
Written by the indexing model from the issue text.
Description
Animated markers missing when using pre1970 dates in TimestampedGeoJson. I understand this functionality from Leaflet.TimeDimension, but had thought this issue was fixed there (Merged pull request: https://github.com/socib/Leaflet.TimeDimension/pull/91).
Please add a code sample or a nbviewer link, copy-pastable if possible
import folium
from folium.plugins import TimestampedGeoJson
# Post-1970 timestamps: 1970-01-02, 1970-01-03, 1970-01-04
milliseconds_per_day = 1000 * 60 * 60 * 24
post_1970_timestamps=[1*milliseconds_per_day, 2*milliseconds_per_day, 3*milliseconds_per_day]
# Pre-1970 timestamps: 1969-12-29, 1969-12-30, 1969-12-31
pre_1970_timestamps=[0-time for time in post_1970_timestamps]
# Ensure pre_1970_timestamps are in ascending order:
pre_1970_timestamps.reverse()
m = folium.Map(location=[0,0],zoom_start=2)
ts=TimestampedGeoJson({
'type': 'FeatureCollection',
'features': [
{
'type': 'Feature',
'geometry': {
'type': 'LineString',
'coordinates': [[-70,-25],[-70,35],[70,35]],
},
'properties': {
# Dates shown in time slider controls, but no markers displayed on map
# Contrast behaviour when times read from post_1970_timestamps list:
# - animated markers shown on map as per example
'times': pre_1970_timestamps
#'times': post_1970_timestamps
}
}
]
})
ts.add_to(m)
m
Problem description
No markers shown on maps using TimestampedGeoJson with dates pre 1970 (as held in pre_1970_timestamps list)
Expected Output
Animated markers as per the TimestampedGeoJson with post_1970_timestamps
Output of folium.__version__
0.10.0
- Dominant language
- Python
- Stars
- 7.4k
- Forks
- 2.3k
- Avg merge
- 17h 22m
- Merged PRs (30d)
- 11
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