Environmental Deterioration Evaluation plugin User’s Guide

1. Provision of Global Map(1) Download
Following site of the Geographical Survey Institute explains how to get Global Map.
http://www.gsi.go.jp/kankyochiri/gm_data.html#gm_data
International Steering Committee for Global Map (ISCGM) provides Global Map of eachcountries. Japanese Global Map can be also downloaded from the Geographical Survey
Institute web site.
http://www.gsi.go.jp/kankyochiri/gm_jpn.html(2) Conversion of the data format
Global Map data is available in BIL, GML, JPG, Shape, TIFF, etc. In this guide, we will
notify about the usage of BIL and GML format especially.
BIL data

GDAL that are used for data conversion library of QGIS, supports BIL format.
Therefore, you can add the BIL data as a raster layer by running the "Add Raster
Layer" menu in QGIS.
However, you should take care about area mostly covered by sea, such as Okinawa andOgasawara Island in Japan. The default style settings of QGIS, the cumulative numberof counts 2.0 - because only fit value to 98.0% of the range not been adopted, there is theimage of one side in the following manner has been blacked out is displayed.

In such a case, please you can change the "load of minimum / maximum value" of thestyle set to "Min / Max" Click Load button.

As a result, the low cell value of the ratio will also be displayed.

GML

As it is load a GML from "Adding a vector layer" menu of QGIS, latitude and longitude
it will appear inverted.

By using the config option of OGR, so that you to read in QGIS you can create the shapeof the once normal latitude and longitude. OGR command to be executed is as follows.
> ogr2ogr -f "ESRI Shapefile" --config GML_INVERT_AXIS_ORDER_IF_LAT_LONG YES--config GML_CONSIDER_EPSG_AS_URN YES outputfile (shp) inputfile(gml)

When you add the outputted shpefile as vector layers, you can see that the reversal of
latitude and longitude is eliminated.

2. Installing plugin(1) Copy plugin source file
EnviromentalEvaluation folder should be copied in the QGIS plugin folder. Path of

QGIS plugin folder differs by OS.
・WindowsC:¥Users¥username¥.qgis2¥python¥plugins* “username” indicates the login account.
・Linux$HOME/.qgis2/python/plugins(2) Registration
Evaluation of environmental deterioration plugin must be activated by the followingsteps.
① On the QGIS menu bar, click “Plugins” > “Manage and install plugins”. Plugins
dialog will be displayed.

② In the dialog, select “installed” tab and check “Evaluation of environmentaldeterioration”.

③ Installed properly, then menu of "Environmental Degradation Evaluation", "Overlayand Matrix tabulation" and "Environmental Degradation Analysis" are added in"Plug-ins" menu. In addition, as a plug-in icon, two icons (characters of OMS andEDA are displayed on green space) will also be added.

3. How to use plugins(1) Load input data on QGIS
Target data should be loaded on QGIS for calculation. Both raster and polygon data arerequired.
① Raster data
Single band and integer type data is available.
e.g. Land use classification data
② Polygon data
By this polygon data such as administrative division, raster value is aggregated.
This is an example. “lu” layer is raster data and “AdmArea” layer is polygon data.

(2) Overlay and Matrix tabulation
This plugin totalizes the raster value for each polygon feature. Result will be exported
as a shapefile.
① Start Overlay and Matrix tabulation plugin
In QGIS menu bar, select the "Plugins" > "Environmental Deterioration
Evaluation" > "Overlay and Matrix tabulation".

② Specify input/output file
Input/output data should be specified to execute the plugin.
--InputBase raster layer

Polygon layer for tabulation

OutputResult shapefile③ Execute calculation
You can execute calculation by pressing the run button. Progress bar will be
displayed to notify which step is performed.

When the calculation completes, you can choose whether to display the result
shapefile on map.

④ Calculation result
Calculated values are registered in attribute table of the output shapefile. Field
names are defined as "C + raster values". For example, the raster value of "10" iscounted on the "C10" field. Data type of these fields are integer.

(3) Environment Deterioration Analysis
Using the results of the "Overlay and Matrix tabulation", this plugin calculates the total
cost in the polygon.
① Start Environment Deterioration Analysis plugin
In QGIS menu bar, select the "Plugins" > " Environment Deterioration Evaluation"> " Environment Deterioration Analysis".

② Specify input/output file
Input/output data should be specified to execute the plugin.
--Input
Tabulation polygon layer

Cost definition file

Output

Result shapefile

Sample of cost definition file is as follows.
C10,1.24
C20,2.2
C30,3.3
C40,5.1

C50,8.678
C60,10.45
C70,20.2
C80,30.1
C90,50③ Execute calculation
You can execute calculation by pressing the run button. Progress bar will be
displayed to notify which step is performed.
When the calculation is complete, you can choose whether to display the result
shapefile on map.

④ Calculation result
Calculated values are registered in the field of "TOTAL". By the TOTAL value, youcan evaluate the effects of environmental deterioration quantitatively.