Changes between Version 38 and Version 39 of Grass7/NewFeatures76


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Timestamp:
Jan 20, 2019, 12:54:08 PM (5 years ago)
Author:
veroandreo
Comment:

+ screenshots, first attempt

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  • Grass7/NewFeatures76

    v38 v39  
    2121GRASS GIS 7.6 graphical user interface now displays the computational region extent by default in the Map Display window. This simple new feature allows to always visualize such an important basic concept in GRASS GIS and makes it a lot easier for newcomers. Moreover, a new widget has been implemented for commands including an SQL WHERE parameter to ease selection of features/data.
    2222
    23 [screenshots here]
     23[[Image(wiki:Grass7/NewFeatures76:grass760_show_region.png, align=right, 300px)]]
    2424
    2525Many fixes were aimed to enhance compatibility with wxPython 4. The data catalog, the graphical modeler and the startup have also received many improvements in this new major GRASS GIS release.
    … …  
    3737This new GRASS GIS release comes with 3 new dedicated raster modules. The first one, G76:r.path, can be used to trace paths from different starting points following input directions, such as the outputs of G76:r.cost, G76:r.walk or G76:r.watershed, among others. The second one, G76:r.buildvrt, provides the very useful functionality of creating virtual raster (VRT) mosaics from a list of input raster maps. This is very useful when the original data are available in tiles which can now be virtually mosaiked to a single map without overhead for easier analysis. G76:r.buildvrt hence allows processing big areas while avoiding the creation of physical maps, especially useful when space is limited. ​Finally, there is now G76:r.mapcalc.simple, a tool to calculate a new raster map from a simple r.mapcalc expression.
    3838
    39 [screenshots here]
     39|| [[Image(wiki:Grass7/NewFeatures76:grass760_r_path.png, align=right, 300px)]] || [[Image(wiki:Grass7/NewFeatures76:grass760_r_mapcalc_simple_01.png, align=right, 300px)]] || [[Image(wiki:Grass7/NewFeatures76:grass760_r_mapcalc_simple_02.png, align=right, 300px)]]
    4040
    4141Several other raster modules have been improved with new options or flags:
    … …  
    4848 * G76:r.cost has a new solver option to control which direction is used in case of multiple directions with equal costs
    4949 * G76:r.colors includes inferno, magma and plasma color tables as well as a new flag -d to list available rules with description (e.g. "srtm: color palette for Shuttle Radar Topography Mission elevation [range: -11000 to 8850]")
    50 
    51 [screenshot here ideally]
    5250
    5351Many raster modules use the new GRASS GIS API for coordinate transformation and are also ready to use [https://proj4.org/ PROJ v5 API] if available (See ''Library'' changes section below). This was a significant improvement and a great effort implemented during the [https://grasswiki.osgeo.org/wiki/GRASS_Community_Sprint_Bonn_2018 OSGeo Code Sprint 2018] in Bonn.
    … …  
    6563 * ​G76:v.buffer now offers to also build squared buffers around points when the -s flag is set
    6664
    67 [screenshot here]
     65[[Image(wiki:Grass7/NewFeatures76:grass760_v_buffer_squared.png, align=right, 300px)]]
    6866
    6967=== Imagery modules ===
    … …  
    7674A very nice improvement in the temporal plot tool (G76:g.gui.tplot) now allows to set labels for title, x and y axes, and to export the plotted time series data in a CSV file.
    7775
    78 [screenshot]
     76[[Image(wiki:Grass7/NewFeatures76:grass760_g_gui_tplot_labels.png, align=right, 300px)]]
    7977
    8078=== Python Scripting ===
    … …  
    117115Among these new extensions there is a set of new addons to import and pre-process Copernicus Sentinel 2 imagery: G7A:i.sentinel.preproc and G7A:i.sentinel.mask. These two modules which add up to the existant G7A:i.sentinel.download and G7A:i.sentinel.import, were contributed by a student under [https://trac.osgeo.org/grass/wiki/GSoC/2018 Google Summer of Code 2018] program. With all these Sentinel related modules GRASS GIS provides now the possibility to create full workflows that include download, import, atmospheric correction and cloud masking of Sentinel 2 imagery. Additional imagery addons include, G7A:i.pysptools.unmix for extracting endmembers and spectral unmixing using [https://pysptools.sourceforge.io/ pysptools] and a set of [https://grass.osgeo.org/grass7/manuals/addons/i.signature.list.html i.signature] tools to list, copy and remove signature files. Moreover, a new set of addons for artificial neural networks was also initially developed, G7A:i.ann.maskrcnn, to perform supervised classification using convolutional neural networks.
    118116
    119 [screenshot here]
     117[[Image(wiki:Grass7/NewFeatures76:grass760_i_sentinel_mask_clouds.png, align=right, 300px)]]
    120118
    121119The list of other new addons include:
    … …  
    128126 * G7A:v.what.strds.timestamp to upload strds values to the attribute table at positions of vector points in space and time
    129127
    130 [other screenshot ideally here]
     128|| [[Image(wiki:Grass7/NewFeatures76:grass760_v_rast_bufferstats_01.png, align=right, 300px)]] || [[Image(wiki:Grass7/NewFeatures76:grass760_v_rast_bufferstats_02.png, align=right, 300px)]]
    131129
    132130== Migrating from GRASS GIS 6 to version 7.x ==