forked from google/earthengine-api
-
Notifications
You must be signed in to change notification settings - Fork 1
/
SeasonalTemperatures.js
49 lines (42 loc) · 1.42 KB
/
SeasonalTemperatures.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
// Plot average seasonal temperatures in U.S. cities.
var seasonalTemps =
ee.FeatureCollection('ft:1G3RZbWoTiCiYv_LEwc7xKZq8aYoPZlL5_KuVhyDM');
// Compute the annual temperature delta.
seasonalTemps = seasonalTemps.map(function(city) {
var julyTemp = ee.Number(city.get('avg_temp_jul'));
var janTemp = ee.Number(city.get('avg_temp_jan'));
return city.set('seasonal_delta', julyTemp.subtract(janTemp));
});
// Select the extreme cities.
var extremeCities =
seasonalTemps.limit(1, 'avg_temp_jan') // Coldest.
.merge(seasonalTemps.limit(1, 'avg_temp_jul', false)) // Hottest.
.merge(seasonalTemps.limit(1, 'seasonal_delta')); // Least variation.
var months = {
avg_temp_jan: 1,
avg_temp_apr: 4,
avg_temp_jul: 7,
avg_temp_oct: 10
};
// Prepare the chart.
var extremeSeasonalTemps = ui.Chart.feature.byProperty(
extremeCities, months, 'city_name');
extremeSeasonalTemps.setChartType('LineChart');
extremeSeasonalTemps.setOptions({
title: 'Average Temperatures in U.S. Cities',
hAxis: {
title: 'Month',
ticks: [{v: months.avg_temp_jan, f: 'January'},
{v: months.avg_temp_apr, f: 'April'},
{v: months.avg_temp_jul, f: 'July'},
{v: months.avg_temp_oct, f: 'October'}]
},
vAxis: {
title: 'Temperature (Celsius)'
},
lineWidth: 1,
pointSize: 3
});
print(extremeSeasonalTemps);
Map.addLayer(extremeCities);
Map.setCenter(-98.5, 39.8, 4);