Presentation about QGIS plugins created for IBAMA: 1) Toggle Active Layer 2) Catalog on the fly 3) Auxiliary Window

1. IBAMA Plugins for QGIS
Brazilian Institute of Environment and Renewable Natural Resources
COTIG – Coordination of Geotechnology
Overview
● Demand: High use of images satellite for
monitoring
● Solution:
● Server: Delivery of images by TMS
● Plugins:
● Quickly change the visibility of the target image.
● Get automatic images from interest area
● Show image in others window.
http://www.ibama.gov.br July 2015 Luiz Motta

2. Delivery of images by TMS
● Processing of ~57K Rapideye images.
Every day are processed Landsat images.
● Use the script(shell and Python) for
create TMS and GDAL_WMS files [1].
[1] https://github.com/lmotta/scripts-for-gis

3. Quickly change the visibility of
the target image
● Plugin: Toggle Active Layer [1]
● Simple tool for change the visibility of active layer.
● When pressing button mouse in map canvas,
change the visibility of active layer.
● It is used for see difference with layers below of
active layer
[1] http://plugins.qgis.org/plugins/toggleactivelayer_plugin/

4. Get automatic images from
interest area.
● Plugin: Catalog on the fly [1]
● Search for catalog layer in current project
● Fields: Date(not mandatory)
and address of each image
*Address: local image or GDAL_WMS for Internet
● Geometry: Footprint of image (polygon layer)
● Get images where intersect with extent map
canvas. Use the features geometry of catalog layer
for query.
[1] https://plugins.qgis.org/plugins/catalogotf_plugin/ - V. 1.0

5. It is not mandatory. The field is date type
Local file, or, Internet by address for WMS_GDAL, prefix = http and suffix = .xml
Get automatic images from
interest area.

6. ● Check the layer, to search
images where intersect with
map canvas.
● Create a “group” for add new
images (name layer - Catalog)
Reverse order by date or name image
Get automatic images from
interest area.

7. ● Buttons for seach features in map canvas:
● Run for all.
● Run for selected.
● Cancel
● Waiting cancel
Get automatic images from
interest area.

8. ● Create contex menu for each image in catalog group:
● Zoom to
● Highlight
WMS_GDAL need have the TAG <TargetWindow>, this TAG is not standard.
TargetWindow: Extent of image.
Get automatic images from
interest area.

9. Show image in other window
● Plugin: Auxiliary Window [1]
● Open the new window with select layers in main
window.
● Auxiliary window is synchronize with main window.
● Can show, hide and remove layer
● Add new selected layers from main
● Select the layer in main window from the auxiliary
window.
● Can see the cursor and extent main map.
[1] http://plugins.qgis.org/plugins/auxiliarywindow_plugin/

10. Show image in other window

11. Toggle with main window:
1) Synchronization
2) Cursor
3) Extent
Actions:
4) Highlight extent in main window
5) Scale factor from main window
6) Set scale this window for main
1 2 3 4 5 6
1 2 3 4 5
Selected layers:
1) Show
2) Hide
3) Remove
4) Add from main window
the selected layers
5) Select current layer in
main window from current
layer in auxiliary window.
Show image in other window

12. Show image in other window

13. Show image in other window

14. Show image in other window