Workouts

Workouts with satellite images

Explore almost unlimited flexibility of VANE Query Language working with satellite images, online processing and integrating them into your applications

Fire detection

Detect areas that were deforested after fire by simple burn index calculating and apply it to chosen area and data of events. You can easily compare images before and after fire by getting visual result immediately.
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RGB Mosaic

One of the simplest operations is to generate RGB mosaic map.

select=b4,b3,b2
op=rgb
color=auto

or you can customise brightness settings:

color=brightness(6000:12000)

Example:

sat.owm.io/sql/12/668/1585?select=b4,b3,b2where=best&color=auto

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False color

To get a false color map, you should set up a combination of bands.

select=b7,b5,b3
Example:

sat.owm.io/sql/12/669/1585?select=b7,b4,b3&where=best&color=auto

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NDVI. Base.

NDVI is a major vegetational index for the agricultural industry and farming.

select=b5,b4
op=ndvi

Example:

sat.owm.io/sql/12/885/1631?select=b5,b4&where=day:2016-200&op=ndvi

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Custom NDVI. Natural color.

NDVI is a major vegetational index for the agricultural industry and farming, with VANE Language you can customize a color scheme to get a proper picture.

select=b5,b4
op=ndvi
color=0:3a2542ff;0.05:a1542aff;0.1:b67927ff;0.15:cda228ff;0.2:ead82fff;
0.25:f8f232ff;0.3:e6ec2eff;0.35:d1df29ff;0.4:b8ce22ff;0.45:a3c11eff;
0.5:8bb117ff;0.55:709f11ff;0.6:5d900dff;0.65:447f06ff;0.7:347104ff;
0.75:2b6003ff;0.8:1f4902ff;1:1f4902ff;

Example:

sat.owm.io/sql?select=b5,b4&op=ndvi&color=..

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Custom NDVI. Contrast.

NDVI is a major vegetational index for the agricultural industry and farming, with VANE Language you can customize a color scheme to get a proper picture.

select=b5,b4
op=ndvi
color=0:d93f2aff;0.05:df452cff;0.1:e66c2eff;0.15:e4622dff;0.2:f2b331ff;
0.25:f7d932ff;0.3:eff630ff;0.35:b0f321ff;0.4:80f116ff;0.45:76f013ff;
0.5:74ed17ff;0.55:6cde28ff;0.6:50ab56ff;0.65:317b83ff;0.7:0648b3ff;
0.75:1f46f0ff;0.8:2d45e9ff;0.85:533dcaff;0.9:783bb1ff;1:a342aeff;

Example:

sat.owm.io/sql?select=b5,b4&op=ndvi&color=..

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Custom NDVI. Dark.

NDVI is a major vegetational index for the agricultural industry and farming, with VANE Language you can customize a color scheme to get a proper picture.

select=b5,b4
op=ndvi
color=0:04123cff;0.03:fcfefcff;0.06:c4baa4ff;0.1:b4966cff;0.13:a4824cff;
0.16:94723cff;0.2:7c9e2cff;0.25:94b614ff;0.3:74aa04ff;0.35:64a204ff;
0.4:549604ff;0.45:3c8604ff;0.5:1c7204ff;0.6:046204ff;
0.7:044a04ff;0.8:043a04ff;0.9:042a04ff;1:041204ff;

Example:

sat.owm.io/sql?select=b5,b4&op=ndvi&color=..

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Before and After

Change

Change Detection

Investigate changes before and after events like fire, drought, flood and other natural disasters as well as human activity like construction rate in some region or crop cultivation. Code your own algorithms to estimate intensity or spreading of changes.

Learn more about change detection

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