QGIS User Guide - QGIS Documentation [PDF]

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QGIS User Guide Rilis 2.8

QGIS Project

30 July 2016

Daftar Isi

1

Pendahuluan

3

2

Konvensi 2.1 Konvensi GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 Konvensi Teks atau Papan Ketik . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 Petunjuk Spesifik Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 5 5 6

3

Kata Pengantar

7

4

Fitur-fitur 4.1 Lihat ; imagerelpath="images/test_image.jpg"; projectpath=qgis.core.QgsProject.instance().fileName(); import os.path; path=os.path.dirname(str(projectpath)) if projectpath != ’’ else None; image=os.path.join(path, imagerelpath); import subprocess; subprocess.Popen( [command, image ] );

Another Python action example is the one that allows us to add new layers to the project. For instance, the following examples will add to the project respectively a vector and a raster. The names of the files to be added to the project and the names to be given to the layers are , group=’Custom’) def myfunc(value1, value2 feature, parent): pass

The short example creates a function ‘myfunc’ that will give you a function with two values. When using the args=’auto’ function argument the number of function arguments required will be calculated by the number of arguments the function has been defined with in Python (minus 2 - feature, and parent). This function then can be used with the following expression: myfunc(’test1’, ’test2’)

Your function will be implemented in the ‘Custom’ Functions of the Expression tab after using the Run Script button. Further information about creating Python code tp://www.qgis.org/html/en/docs/pyqgis_developer_cookbook/index.html.

can

be

found

on

ht-

The function editor is not only limited to working with the field calculator, it can be found whenever you work with expressions. See also Expressions. .

136

Bab 12. Pekerjaan dengan , ATTRS{idProduct}=="0003", MODE="666"

After that is necessary to be sure that the garmin_gps kernel module is not loaded rmmod garmin_gps

and then you can use the GPS Tools. Unfortunately there seems to be a bug #7182 and usually QGIS freezes several times before the operation work fine. BTGP-38KM encoding="UTF-8"?>

The parser reads this definition and creates a new tab inside the Toolbox when you select the module. A more detailed description for adding new modules, changing a module’s group, etc., can be found on the QGIS wiki at http://hub.qgis.org/projects/quantum-gis/wiki/Adding_New_Tools_to_the_GRASS_Toolbox. .

16.9. The GRASS Toolbox

191

QGIS User Guide, Rilis 2.8

192

Bab 16. GRASS GIS Integration

BAB 17

QGIS processing framework

.

17.1 Pengantar This chapter introduces the QGIS processing framework, a geoprocessing environment that can be used to call native and third-party algorithms from QGIS, making your spatial analysis tasks more productive and easy to accomplish. Pada bagian berikut kita akan meninjau bagaimana menggunakan unsur-unsur grafis dari kerangka kerja ini dan mengambil yang terbaik masing-masing dari mereka. There are four basic elements in the framework GUI, which are used to run algorithms for different purposes. Choosing one tool or another will depend on the kind of analysis that is to be performed and the particular characteristics of each user and project. All of them (except for the batch processing interface, which is called from the toolbox, as we will see) can be accessed from the Processing menu item. (You will see more than four entries. The remaining ones are not used to execute algorithms and will be explained later in this chapter.) • Toolbox. Unsur utama dari GUI, digunakan untuk menjalankan algoritma tunggal atau menjalankan proses batch berdasarkan algoritma tersebut.

Gambar 17.1: Processing Toolbox

193

QGIS User Guide, Rilis 2.8

• Modeler grafis. Beberapa algoritma dapat dikombinasikan secara grafis dengan menggunakan modeler untuk mendefinisikan alur kerja, menciptakan satu proses yang melibatkan beberapa sub-proses

Gambar 17.2: Processing Modeler • Sejarah pengelola. Semua tindakan dilakukan dengan menggunakan salah satu elemen tersebut disimpan dalam berkas sejarah dan dapat kemudian dengan mudah direproduksi menggunakan manajer sejarah • Antarmuka pengolahan batch. Antarmuka ini memungkinkan Anda untuk menjalankan proses batch dan mengotomatisasi eksekusi algoritma tunggal pada beberapa ) output=SpatialPoints)

The variable polygon already contains a SpatialPolygons?> Import all photograph points This command will import all of the encoding="UTF-8"?>

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