Plugin eVis¶

Peluncuran modul Navigasi Event¶

To launch the Event Browser module, click on Database ‣ eVis ‣ eVis Event Browser. This will open the Generic Event Browser window.

The Event Browser window has three tabs displayed at the top of the window. The Display tab is used to view the photograph and its associated attribute data. The Options tab provides a number of settings that can be adjusted to control the behavior of the eVis plugin. Lastly, the Configure External Applications tab is used to maintain a table of file extensions and their associated application to allow eVis to display documents other than images.

Memahami jendela Tampilan¶

Melihat jendela Tampilan, klik tab Tampilan di jendela Navigasi Kegiatan. Jendela Tampilan digunakan untuk melihat foto-foto geocoded dan data atribut yang terkait.

Tampilan jendela eVis

1. Jendela Tampilan: Sebuah jendela di mana foto itu akan muncul.

2. Tombol memperbesar: Memperbesar untuk melihat lebih detil. Jika seluruh gambar tidak dapat ditampilkan di jendela layar, scroll bar akan muncul di sisi kiri dan bawah jendela untuk memungkinkan Anda untuk menjelajah gambar.

3. Tombol memperkecil: Memperkecil untuk melihat lebih banyak daerah.

4. Perbesar ke seluruh area: Menampilkan secara penuh dari foto.

5. Attribute information window: All of the attribute information for the point associated with the photograph being viewed is displayed here. If the file type being referenced in the displayed record is not an image but is of a file type defined in the Configure External Applications tab, then when you double-click on the value of the field containing the path to the file, the application to open the file will be launched to view or hear the contents of the file. If the file extension is recognized, the attribute data will be displayed in green.

6. Tombol navigasi: Gunakan tombol Sebelumnya dan Berikutnya untuk memuat fitur sebelumnya atau berikutnya ketika lebih dari satu fitur yang dipilih.

Memahami jendela Opsi¶

Jendela Opsi eVis

1. File path: A drop-down list to specify the attribute field that contains the directory path or URL for the photographs or other documents being displayed. If the location is a relative path, then the checkbox must be clicked. The base path for a relative path can be entered in the Base Path text box below. Information about the different options for specifying the file location are noted in the section Menentukan lokasi dan nama dari sebuah foto below.
2. Compass bearing: A drop-down list to specify the attribute field that contains the compass bearing associated with the photograph being displayed. If compass bearing information is available, it is necessary to click the checkbox below the drop-down menu title.
3. Compass offset: Compass offsets can be used to compensate for declination (to adjust bearings collected using magnetic bearings to true north bearings). Click the Manual radio button to enter the offset in the text box or click the From Attribute radio button to select the attribute field containing the offsets. For both of these options, east declinations should be entered using positive values, and west declinations should use negative values.
4. Directory base path: The base path onto which the relative path defined in Figure_eVis_options (A) will be appended.

5. Ganti path: Jika kotak centang ini diperiksa, hanya nama berkas dari A akan ditambahkan ke basis path.

6. Apply rule to all documents: If checked, the same path rules that are defined for photographs will be used for non-image documents such as movies, text documents, and sound files. If not checked, the path rules will only apply to photographs, and other documents will ignore the base path parameter.
7. Remember settings: If the checkbox is checked, the values for the associated parameters will be saved for the next session when the window is closed or when the [Save] button below is pressed.

8. Atur ulang nilai: Mengatur ulang nilai pada baris ini ke pengaturan default.

9. Restore defaults: This will reset all of the fields to their default settings. It has the same effect as clicking all of the [Reset] buttons.

10. Simpan: Akan menyimpan pengaturan tanpa menutup panel Opsi.

Memahami jendela Konfigurasi Aplikasi Eksternal¶

Jendela Aplikasi Eksternal eVis

1. Tabel referensi berkas: Sebuah tabel yang berisi jenis berkas yang dapat dibuka dengan menggunakan eVis. Setiap jenis berkas membutuhkan ekstensi berkas dan path ke aplikasi yang dapat membuka jenis berkas. Hal ini memberikan kemampuan membuka berbagai berkas seperti film, rekaman suara, dan dokumen teks, bukan hanya gambar.

2. Tambah jenis berkas baru: Tambahkan jenis berkas baru dengan ekstensi yang unik dan path untuk aplikasi yang dapat membuka berkas.

3. Hapus baris saat ini: Menghapus jenis berkas yang disorot dalam tabel dan didefinisikan oleh ekstensi berkas dan path ke sebuah aplikasi terkait.

Peluncuran modul ID Event¶

To launch the ‘Event ID’ module, either click on the ^{Event ID} icon or click on Database ‣ eVis ‣ Event ID Tool. This will cause the cursor to change to an arrow with an ‘i’ on top of it signifying that the ID tool is active.

To view the photographs linked to vector features in the active vector layer displayed in the QGIS map window, move the Event ID cursor over the feature and then click the mouse. After clicking on the feature, the Event Browser window is opened and the photographs on or near the clicked locality are available for display in the browser. If more than one photograph is available, you can cycle through the different features using the [Previous] and [Next] buttons. The other controls are described in the Navigasi Event section of this guide.

Peluncuran modul Sambungan Basisdata¶

To launch the ‘Database Connection’ module, either click on the appropriate icon ^{eVis Database Connection} or click on Database ‣ eVis ‣ Database Connection. This will launch the Database Connection window. The window has three tabs: Predefined Queries, Database Connection, and SQL Query. The Output Console window at the bottom of the window displays the status of actions initiated by the different sections of this module.

Menyambung ke basisdata¶

Click on the Database Connection tab to open the database connection interface. Next, use the Database Type combo box to select the type of database that you want to connect to. If a password or username is required, that information can be entered in the Username and Password textboxes.

Enter the database host in the Database Host textbox. This option is not available if you selected ‘MS Access’ as the database type. If the database resides on your desktop, you should enter “localhost”.

Masukkan nama basisdata di kotak teks Nama Basisdata. Jika Anda memilih ‘ODBC’ sebagai tipe basisdata, Anda harus memasukkan nama sumber data.

When all of the parameters are filled in, click on the [Connect] button. If the connection is successful, a message will be written in the Output Console window stating that the connection was established. If a connection was not established, you will need to check that the correct parameters were entered above.

Jendela Sambungan Basisdata eVis

1. Tipe database: Sebuah daftar drop-down untuk menentukan jenis basisdata yang akan digunakan.

2. Host Basisdata: Nama host basisdata.

3. Port: Nomor port jika MySQL atau PostgreSQL tipe database yang dipilih.

4. Nama Basisdata: Nama dari basisdata.

5. Sambung: Sebuah tombol untuk menghubungkan ke basisdata menggunakan parameter yang didefinisikan di atas.

6. Keluaran Konsol: Jendela konsol di mana pesan yang terkait dengan pengolahan akan ditampilkan.

7. Namapengguna: Namapengguna/Username untuk digunakan ketika basisdata dilindungi kata sandi/password.

8. Kata sandi: Kata sandi/Password digunakan ketika basisdata dilindungi kata sandi.

9. Query yang ditentukan: Tab untuk membuka jendela “Query yang ditentukan”.

10. Sambungan Basisdata: Tab membuka jendela “Sambungan Basisdata”.

11. Query SQL: Tab membuka jendela “Query SQL”.

12. Bantuan: Tampilan bantuan dalam jaringan.

13. OK: Tutup jendela utama “Sambungan Basisdata”.

Menjalankan query SQL¶

SQL queries are used to extract information from a database or ODBC resource. In eVis, the output from these queries is a vector layer added to the QGIS map window. Click on the SQL Query tab to display the SQL query interface. SQL commands can be entered in this text window. A helpful tutorial on SQL commands is available at http://www.w3schools.com/sql. For example, to extract all of the data from a worksheet in an Excel file, select * from [sheet1$] where sheet1 is the name of the worksheet.

Click on the [Run Query] button to execute the command. If the query is successful, a Database File Selection window will be displayed. If the query is not successful, an error message will appear in the Output Console window.

Di jendela Pilih Berkas Basisdata, masukkan nama lapisan yang akan dibuat dari hasil query dalam kotak teks Nama Lapisan Baru.

Tab query SQL eVis

1. Jendela Teks Query SQL: Sebuah layar untuk mengetik query-query SQL.

2. Jalankan Query: Tombol untuk mengeksekusi query dimasukkan dalam Jendela Query SQL.

3. Jendela Konsol: Jendela konsol di mana pesan yang terkait dengan pengolahan akan ditampilkan.

4. Bantuan: Tampilan bantuan dalam jaringan.

5. OK: Menutup jendela Sambungan Basisdata.

Use the X Coordinate and Y Coordinate combo boxes to select the fields from the database that stores the X (or longitude) and Y (or latitude) coordinates. Clicking on the [OK] button causes the vector layer created from the SQL query to be displayed in the QGIS map window.

To save this vector file for future use, you can use the QGIS ‘Save as...’ command that is accessed by right-clicking on the layer name in the QGIS map legend and then selecting ‘Save as...’

Menjalankan query-query yang ditentukan¶

With predefined queries, you can select previously written queries stored in XML format in a file. This is particularly helpful if you are not familiar with SQL commands. Click on the Predefined Queries tab to display the predefined query interface.

To load a set of predefined queries, click on the ^{Open File} icon. This opens the Open File window, which is used to locate the file containing the SQL queries. When the queries are loaded, their titles as defined in the XML file will appear in the drop-down menu located just below the ^{Open File} icon. The full description of the query is displayed in the text window under the drop-down menu.

Select the query you want to run from the drop-down menu and then click on the SQL Query tab to see that the query has been loaded into the query window. If it is the first time you are running a predefined query or are switching databases, you need to be sure to connect to the database.

Click on the [Run Query] button in the SQL Query tab to execute the command. If the query is successful, a Database File Selection window will be displayed. If the query is not successful, an error message will appear in the Output Console window.

Tab eVis Queri Ditentukan

1. Buka Berkas: Meluncurkan “Buka Berkas” navigasi berkas untuk mencari berkas XML memegang query yang telah ditetapkan.

2. Query Ditentukan: Sebuah daftar drop-down dengan semua query yang didefinisikan oleh query berkas XML yang telah ditetapkan.

3. Deskripsi Query: Sebuah deskripsi singkat dari query. Deskripsi ini adalah dari query yang telah ditentukan berkas XML.

4. Jendela Konsol: Jendela konsol di mana pesan yang terkait dengan pengolahan akan ditampilkan.

5. Bantuan: Tampilan bantuan dalam jaringan.

6. OK: Tutup jendela utama “Sambungan Basisdata”.

Format XML untuk eVis query yang ditentukan¶

Tag XML dibaca oleh eVis

Contoh berkas XML lengkap dengan tiga query ditampilkan di bawah ini:

<?xml version="1.0"?>
<doc>
 <query>
   <shortdescription>Import all photograph points</shortdescription>
   <description>This command will import all of the data in the SQLite database to QGIS
      </description>
   <databasetype>SQLITE</databasetype>
   <databasehost />
   <databaseport />
   <databasename>C:\textbackslash Workshop/textbackslash
eVis\_Data\textbackslash PhotoPoints.db</databasename>
   <databaseusername />
   <databasepassword />
   <sqlstatement>SELECT Attributes.*, Points.x, Points.y FROM Attributes LEFT JOIN
      Points ON Points.rec_id=Attributes.point_ID</sqlstatement>
   <autoconnect>false</autoconnect>
 </query>
  <query>
   <shortdescription>Import photograph points "looking across Valley"</shortdescription>
   <description>This command will import only points that have photographs "looking across
      a valley" to QGIS</description>
   <databasetype>SQLITE</databasetype>
   <databasehost />
   <databaseport />
   <databasename>C:\Workshop\eVis_Data\PhotoPoints.db</databasename>
   <databaseusername />
   <databasepassword />
   <sqlstatement>SELECT Attributes.*, Points.x, Points.y FROM Attributes LEFT JOIN
      Points ON Points.rec_id=Attributes.point_ID where COMMENTS='Looking across
      valley'</sqlstatement>
   <autoconnect>false</autoconnect>
 </query>
 <query>
   <shortdescription>Import photograph points that mention "limestone"</shortdescription>
   <description>This command will import only points that have photographs that mention
      "limestone" to QGIS</description>
   <databasetype>SQLITE</databasetype>
   <databasehost />
   <databaseport />
   <databasename>C:\Workshop\eVis_Data\PhotoPoints.db</databasename>
   <databaseusername />
   <databasepassword />
   <sqlstatement>SELECT Attributes.*, Points.x, Points.y FROM Attributes LEFT JOIN
      Points ON Points.rec_id=Attributes.point_ID where COMMENTS like '%limestone%'
      </sqlstatement>
   <autoconnect>false</autoconnect>
 </query>
</doc>