If this field is blank, CSV file names will be generated automatically. The name of the attribute column in the polygonal layer for resulting CSV files. The tool intersects a polygonal layer with another vector layer (any type of geometry) and outputs the result as a set of CSV files.įield name for CSV file. View the source data and calculation results on the interactive map: The initial rasters and the vector mask can be in different coordinate systems before processing, all data is brought into a single spatial domain.ĭownload an example of initial data and calculation results:
NEXTGIS MYTRACKS ARCHIVE
Then the multi-band raster (assembled from the archive or submitted immediately) is cropped with a vector mask. The order of the bands is determined by alphabetically sorting the names of the initial rasters in the archive. If the input is an archive with single-band rasters, the tool first combines them into a multi-band raster. The extension will be automatically installed in. Use the - symbol to use the default value.
NEXTGIS MYTRACKS ZIP
ZIP archive with ESRI Shapefile or a other file format supported by OGR. ZIP archive with a set of single-baned GDAL-compatible rasters Multi-band raster in GDAL-compatible format The initial raster data can be presented in two forms: Line2 - bypass lines in the direction, which is parallel to the line represented by the anchor point and reference pointĪ tool that performs a per-band connection of a set of single-band rasters and crops the result using a vector mask. Line1 - bypass lines in the direction, which if perpendicular to the line represented by the anchor point and reference point 4 times larger cells, each large cell is divided into 4 parts) Rect2 - a grid of smaller cells the size of size1 * size2 cells (i.e. Rect1 - a grid of cells the size of size1 * size2 cells, the center of the first cell is at the anchor point The result of the process is a set of layers: From this line, either to the right or left of it, a second line is laid out with the length of size2 * base_interval, meters. Side - Cell generation side (right, left)īase_interval - The size of a cell’s side, metersĬalculation algorithm: from the anchor point in the direction of the reference point a line is drawn with a length equal to size1 * base_interval. Size2 - Number of cells on the second axis Size1 - Number of cells on the first axis This tool creates a set of square grids (polygons) and a transect of their detour for a given territory.
NDSI - for assessing the snow cover (the first raster - GREEN, the second - SWIR). NDWI - for the detection of water bodies (the first raster - NIR, the second - SWIR). NDVI - for vegetation assessment (the first raster - NIR, the second - RED) For Landsat 8 data: 5 and 4 bands. The projection and spatial resolution of the first raster is used.Įxamples of common normalized difference indices: The pixel values of the resulting raster are in the range from -1 to 1īefore the calculation, both images are brought into a single spatial domain. The calculation is carried out according to the formula: (First image - Second image) / (First image + Second image). The tool calculates the normalized difference index for any two input images.Ī raster with normalized difference index in GeoTiff format
NEXTGIS MYTRACKS SERIES
Radiometric calibration is necessary for time series analysis, calculation of derivative products (for example, index images).ĭownload an example of source data and calculation results: The radiation intensity of the corresponding band in the GeoTIFF format Depending on the data type, it is a * MTL.txt or *. Text file from the original Landsat data archive. Usually a number, for ETM + it can also be 6_VCID_1 and 6_VCID_2 The band number corresponding to the downloaded file.
Processing level L1 file from the original Landsat data archive. The tool converts the Landsat raw data into radiation intensity (ToA Radiance). Possible input values: a number indicating one level, for example, 10 a range of levels, for example, 8-14 hyphen - for auto-selection of levelsĢ.2.15. This refers to standard zoom levels, for example, as for OSM maps. Zoom levels - the levels at which the tiles will be displayed. Tiles name - the name that will be used for the file name and for the layer in NGM Raster dataset - RGB, RGBA, single-band gray or single-band with palette GDAL-compatible raster Use an empty text file to keep the original palette (for single-band with palette) and for RGB / RGBA rasters. Opacity ranges from 0 to 255, 0 - completely transparent, 255 - completely opaque. For example, for a value of 23, assigning a completely opaque lilac color looks like this: 23 200 162 200 255. Palette file - TXT file with color scheme of each raster values located in a separate line. Service generates raster tiles (NGM format) from input gdal-supported raster.
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