「Plugins delimited text」の版間の差分
(ページの作成: <H2> Delimited Text Plugin </H2> <P> The Delimited Text plugin allows you to load a delimited text file as a layer in QGIS. <P> Requirements <P> To view a delimited text …) |
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− | + | ==Delimited Text Plugin== | |
− | Delimited Text Plugin | + | |
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The Delimited Text plugin allows you to load a delimited text file as a layer in QGIS. | The Delimited Text plugin allows you to load a delimited text file as a layer in QGIS. | ||
− | + | ===Requirements=== | |
− | Requirements | + | |
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To view a delimited text file as layer, the text file must contain: | To view a delimited text file as layer, the text file must contain: | ||
− | + | #A delimited header row of field names. This must be the first line in the text file. | |
+ | #The header row must contain an X and Y field. These fields can have any name. | ||
+ | #The x and y coordinates must be specified as a number. The coordinate system is not important. | ||
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As an example of a valid text file we import the elevation point data file | As an example of a valid text file we import the elevation point data file | ||
− | elevp.csv coming with the QGIS sample dataset (See Section | + | elevp.csv coming with the QGIS sample dataset (See Section [[はじめましょう#サンプルデータ|3.2]]): |
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<PRE> | <PRE> | ||
X;Y;ELEV | X;Y;ELEV | ||
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</PRE> | </PRE> | ||
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Some items of note about the text file are: | Some items of note about the text file are: | ||
− | + | #The example text file uses ; as delimiter. Any character can be used to delimit the fields. | |
− | + | #The first row is the header row. It contains the fields X, Y and ELEV. | |
− | + | #No quotes (") are used to delimit text fields. | |
− | + | #The x coordinates are contained in the ''X'' field. | |
− | + | #The y coordinates are contained in the ''Y'' field. | |
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− | + | ===Using the Plugin=== | |
− | + | To use the plugin you must first enable it as described in Section [[QGISプラグイン#Managing Plugins|11.1]]. | |
− | + | Click the new toolbar icon {{Template:ToolBtnTwo|Delimited_text|Add Delimited Text Layer}} to open the Delimited Text dialog as shown in Figure [[#Figure 42|42]]. | |
− | + | {{Template:Figure|num=42|caption=Delimited Text Dialog|fname=Delimited_text_dialog|width=390px}} | |
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− | Delimited Text Dialog | + | |
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First select the file (e.g., qgis_sample_data/csv/elevp.csv) to import by clicking | First select the file (e.g., qgis_sample_data/csv/elevp.csv) to import by clicking | ||
− | on the Browse button. Once the file is selected, the plugin attempts to parse the file | + | on the {{Template:Button|Browse}} button. Once the file is selected, the plugin attempts to parse the file |
− | using the last used delimiter, in this case a semi-colon ( | + | using the last used delimiter, in this case a semi-colon (;). To properly parse the file, it |
is important to select the correct delimiter. To change the delimiter to tab use | is important to select the correct delimiter. To change the delimiter to tab use | ||
\t (this is a regular expression for the tab character). | \t (this is a regular expression for the tab character). | ||
− | After changing the delimiter, click Parse. | + | After changing the delimiter, click {{Template:Button|Parse}}. |
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Once you have parsed the file, choose the X and Y fields from the drop down lists and | Once you have parsed the file, choose the X and Y fields from the drop down lists and | ||
− | enter a Layer name (e.g., elevp ) as shown in Figure | + | enter a Layer name (e.g., elevp ) as shown in Figure [[#Figure 42|42]]. To add the layer to the map, click |
− | + | {{Template:Button|Add Layer}}. The delimited text file now behaves as any other map layer in QGIS. | |
− | Add Layer. The delimited text file now behaves as any other map layer in QGIS. | + |
2009年9月11日 (金) 06:57時点における版
Delimited Text Plugin
The Delimited Text plugin allows you to load a delimited text file as a layer in QGIS.
Requirements
To view a delimited text file as layer, the text file must contain:
- A delimited header row of field names. This must be the first line in the text file.
- The header row must contain an X and Y field. These fields can have any name.
- The x and y coordinates must be specified as a number. The coordinate system is not important.
As an example of a valid text file we import the elevation point data file elevp.csv coming with the QGIS sample dataset (See Section 3.2):
X;Y;ELEV -300120;7689960;13 -654360;7562040;52 1640;7512840;3 [...]
Some items of note about the text file are:
- The example text file uses ; as delimiter. Any character can be used to delimit the fields.
- The first row is the header row. It contains the fields X, Y and ELEV.
- No quotes (") are used to delimit text fields.
- The x coordinates are contained in the X field.
- The y coordinates are contained in the Y field.
Using the Plugin
To use the plugin you must first enable it as described in Section 11.1.
Click the new toolbar icon Add Delimited Text Layer to open the Delimited Text dialog as shown in Figure 42.
図 42: Delimited Text Dialog |
First select the file (e.g., qgis_sample_data/csv/elevp.csv) to import by clicking
on the Browse button. Once the file is selected, the plugin attempts to parse the file
using the last used delimiter, in this case a semi-colon (;). To properly parse the file, it
is important to select the correct delimiter. To change the delimiter to tab use
\t (this is a regular expression for the tab character).
After changing the delimiter, click Parse.
Once you have parsed the file, choose the X and Y fields from the drop down lists and enter a Layer name (e.g., elevp ) as shown in Figure 42. To add the layer to the map, click Add Layer. The delimited text file now behaves as any other map layer in QGIS.