Query Builder:Examples of how Polygon can be used

Query Builder:Examples of how Polygon can be used

Our service offers 2 Polygon user modes: (1) contour drawing and (2) API mode.
Both operating modes allow the user to divide up the required area (polygon), edit it, and obtain information about the polygon and the URL, which can then used later on the website or in the app.

Contour drawing mode. 

In contour drawing regime you can create polygons (1), edit their borders (2), click on the view polygon button to get data about that polygon (geojson: coordinates of the polygon peak heights and lengths), (3) and upload your polygon from the geojson file by clicking the upload file button or dragging it with your mouse (4).

API Regime 

In API mode setting the polygon parameters can be done via a standard API data template request.The dedicated polygon can be filled in according to the filters that were set during drawing mode. The main menu will display as a background from openstreetmap. Where required, you can switch to different satellite background operating modes in the left-hand corner. You can still use the menu, and any changes made to the polygon under this setting will be saved.

In order to change the polygon regime and make sure your changes save correctly, go into edit mode and then save your changes.
After adjusting any settings and making any edits, by clicking on “get the URL” you’ll then get a scanned link.
Use this tile server URL in your application as a template with any standard mapping libraries like Leaflet, Mapbox, Google Map, and Open Layers.
Important! You need to get API key and replace {APIKEY} with your personal one

The Polygon tool

The Polygon tool

An example of one of the services for agricultural applications offered by VANE has now been added to the Query Builder interface.

The Polygon tool allows you to isolate any outline you want in the photograph, process the satellite images in RGB and EVI, and arrange any color palette with any scale for a specific area.
It is possible to edit it, obtain data on the depicted polygon and download it from the geojson file.

 Then you can get the URL with the assembled polygon and copy it to your site

Query Builder: Сolor palette. Adjusting the gradient palette.

Query Builder: Сolor palette. Adjusting the gradient palette.

Adjusting the gradient palette is possible for NDVI, EVI, and NDI operations.

To define the colors of the gradient palette, you must specify the key points relative to which the gradient will be made.
To define the key points, you must indicate a couple of values in the Palette field for each point in [s:cccccctt] format, where “s” means the brightness of the original band, “c” is the hexadecimal color code, and “tt” represents the transparency value. For example, 0:000000ff indicates that the original raster values equal 0, it must be shown in black, and it has an “opacity” value = 0.
When specifying more than one key point, their values should be separated with the “;” symbol.
In order to change the preset color palette, just uncheck Color default and set the desired parameters.
After selecting operations and sources and setting the desired parameters, the only thing left is to get the generated link as requested by clicking the GET THE URL button.

Use this tile server URL in your application as a template with any standard mapping libraries like Leaflet, Mapbox, Google Map, and Open Layers.

Important! You need to get API key and replace {APIKEY} with your personal one

Query Builder: Customizing the color palette. Setting brightness, contrast, gamma

Query Builder: Customizing the color palette. Setting brightness, contrast, gamma

In our interface, you can change the display parameters.

Setting brightness, contrast, gamma correction, and use of a logarithmic scale are available for the Truecolor, Falsecolor, and RGB processing types
To change the brightness and contrast parameters, you must set the minimum and maximum brightness display range for each band using the corresponding fields. For overall decreasing and increasing of brightness, you can use gamma correction. Additionally, it’s also possible to use the logarithmic scale.

After selecting operations and sources and setting the desired parameters, the only thing left is to get the generated link as requested by clicking the GET THE URL button.

Use this tile server URL in your application as a template with any standard mapping libraries like Leaflet, Mapbox, Google Map, and Open Layers.

Important! You need to get API key and replace {APIKEY} with your personal one.

Query Builder: Changing the band set. Use the Select tab

Query Builder: Changing the band set. Use the Select tab

Changing the band set is possible only for the basic operations of RGB, NDI, and EVI (limited).

In order to change the band, simply use your cursor to drag and drop the icon of the desired band to the place of the one that you want to replace. The black color indicates bands that are not visible to the human eye, such as SWIR, thermal infrared, etc.
You can find more information about bands by looking here

After selecting operations and sources and setting the desired parameters, the only thing left is to get the generated link as requested by clicking the GET THE URL button.

Use this tile server URL in your application as a template with any standard mapping libraries like Leaflet, Mapbox, Google Map, and Open Layers.

Important! You need to get API key and replace {APIKEY} with your personal one.

Query Builder: Creating a map. Setting a time range

Query Builder: Creating a map. Setting a time range

Creating a map

To create a map, you must complete a few simple tasks:

  1. Select a data source;
  2. Select a processing type;
  3. Set the time range

Setting a time range

In order to give the desired data or time interval, the where field, located on the settings panel, is used. To define the parameters, it is enough to click on the calendar icon and set the needed dates or enter the parameter value manually in one of the supported formats (see hint)
Attention: When selecting a specific date (for example, the current day), images from sources may not be present for a certain part of the Earth’s surface.

Additionally, if a time interval is being used in the display, then you can determine the overlay order of the images. Three overlay modes are available:

1. First - images are shown in order from earliest to latest within the given time interval (the early images are on top)

2. Last - images are shown in order from latest to earliest within the given time interval (the later images are on top)

3. Best - the best of what is available. In this case, the image display order is set depending on a combination of various parameters, including percentage of cloud cover, coverage area, quality, etc.

4. To change the image overlay order, the Order parameter is used.

Parameter of query: order
The result can include lots of images. To optimize it you can set up an order of choosing and combining of images.
You can choose amongst the following parameters like first, last or best.
order=first

After selecting operations and sources and setting the desired parameters, the only thing left is to get the generated link as requested by clicking the GET THE URL button.

Use this tile server URL in your application as a template with any standard mapping libraries like Leaflet, Mapbox, Google Map, and Open Layers.

Important! You need to get API key and replace {APIKEY} with your personal one.

Query Builder: Creating a map. Selecting a processing type

Creating a map

To create a map, you must complete a few simple tasks:

  1. Select a data source;
  2. Select a processing type;
  3. Set the time range

Selecting a processing type 

In the next stage, you must select one of the processing types for space images available in the system.

1.Display in RGB or Grey mode
2.Computation of special products like NDI and EVI

The assortment of processing types is available in the PRESETS tab of the settings panel:
To select the desired processing type, the Presets tab is used with corresponding buttons (2). The current value of a parameter is shown in the Presets field (1). A description of a parameter and its possible values can be viewed by clicking on the hint icon (3)


For ease of use, some processing types are presented in the form of prepared templates. By using them, you can quickly and compactly get the URL address of the desired operation. These templates are available for the following processing types:

1. Truecolor - display of the three spectral bands of the visible range [Red, Green, Blue].

2. Falsecolor - display of the three spectral bands of the visible and near infrared range [NIR, Red, Green].

3. NDVI - calculation of the normalized vegetation index

4. EVI - calculation of the enhanced vegetation index


If needed, you can specify a special processing type:

1.RGB - display of the three spectral bands in an arbitrary combination.

2.NDI - calculation of the normalized index on randomly given spectral bands.


You can find more information about parameters by looking here.

After selecting operations and sources and setting the desired parameters, the only thing left is to get the generated link as requested by clicking the GET THE URL button.

Use this tile server URL in your application as a template with any standard mapping libraries like Leaflet, Mapbox, Google Map, and Open Layers.

Important! You need to get API key and replace {APIKEY} with your personal one.

Query Builder: Creating a map. Selecting a data source

Creating a map

To create a map, you must complete a few simple tasks:

  1. Select a data source;
  2. Select a processing type;
  3. Set the time range.

Selecting a data source.

To select a data source using the FROM tab in the settings panel:

To select one of the data sources available in the system, you must open the From tab and select the desired image type by clicking on the button below in the Choose group.
At the present time, data available in the system includes those from the spacecraft Terra/MODIS (terra), Aqua/MODIS (aqua), Landsat-8 (l8 and l8t), Sentinel-2A and Sentinel-2B (s2), the RapidEye (re) group, as well as composite, low-cloud coverage on our platform from Cloudless. The L8l and l8t data sources will be joined in the near future.

You can find more information about parameters by looking here.

Query Builder: Modes and control elements. Creating a map.

We begin the publication with a series of short instructions on worked with our new web interface Query Builder for Vane platform.

Modes and control elements:


0 - settings panel;
1 - layer selection - map, satellite image, space image, and legend (hybrid map);
2 - full-screen mode;
3 - quick switch to hybrid map;
4 - search by place name;
5 - scale;
6 - from the bottom left, the geographical coordinates and and coordinates of the tile under the cursor are shown.

Creating a map

To create a map, you must complete a few simple tasks:

  1. Select a data source;

  2. Select a processing type;

  3. Set the time range.

Additionally, you can set display parameters and choose spectral bands specific to your objective.

After selecting operations and sources and setting the desired parameters, the only thing left is to get the generated link as requested by clicking the GET THE URL button.

Use this tile server URL in your application as a template with any standard mapping libraries like Leaflet, Mapbox, Google Map, and Open Layers.

Important! You need to get API key and replace {APIKEY} with your personal one

Monitoring of fields by satellite imagery. NDVI by Landsat 8 and Sentinel 2

Monitoring of fields by satellite imagery. NDVI by Landsat 8 and Sentinel 2

Let’s consider an example of the application where you can trace a condition of any part of fields timely and with visual representation. For that, for your specified polygon on a satellite image we calculate Vegetation index (NDVI ) for a time period of several years.