GRASSベクターレイヤのデジタイズと編集のソースを表示
提供: OSGeo.JP Wiki
←
GRASSベクターレイヤのデジタイズと編集
移動:
案内
、
検索
あなたには「このページの編集」を行う権限はありません。理由は以下の通りです:
この操作は、以下のグループに属する利用者のみが実行できます:
登録利用者
。
ページの編集を始める前にメールアドレスの確認をする必要があります。
個人設定
でメールアドレスを設定し、確認を行ってください。
このページのソースの閲覧やコピーができます:
<H2> Digitizing and editing a GRASS vector layer </H2> <P> The digitizing tools for GRASS vector layers are accessed using the grass_editEdit GRASS vector layer icon on the toolbar. Make sure you have loaded a GRASS vector and it is the selected layer in the legend before clicking on the edit tool. Figure <A HREF="#fig:grass_digitizing_category">30</A> shows the GRASS edit dialog that is displayed when you click on the edit tool. The tools and settings are discussed in the following sections. <P> <BR> <IMG WIDTH="500" HEIGHT="11" ALIGN="BOTTOM" BORDER="0" SRC="img4.png" ALT="\begin{Tip} % latex2html id marker 267 \caption{\textsc{Digitizing polygones in ... ...mation of a polygon always to the centroid and not to the boundary. } \end{Tip}"> <BR> <P> Toolbar<A NAME="label_grasstoolbar"></A> <P> In Figure <A HREF="#fig:grass_digitizing_toolbar">29</A> you see the GRASS digitizing toolbar icons provided by the GRASS plugin. Table <A HREF="#tab:grass_tools">3</A> explains the available functionalities. <P> <DIV ALIGN="CENTER"><A NAME="fig:grass_digitizing_toolbar"></A><A NAME="278"></A> <TABLE> <CAPTION ALIGN="BOTTOM"><STRONG>Figure:</STRONG> GRASS Digitizing Toolbar </CAPTION> <TR><TD> <DIV ALIGN="CENTER"> [clip=true,width=12cm]grass_digitizing_toolbar </DIV></TD></TR> </TABLE> </DIV> <P> <BR><P></P> <DIV ALIGN="CENTER"> <A NAME="284"></A> <DIV ALIGN="CENTER"> </DIV><A NAME="tab:grass_tools"></A><P> <BR> <A NAME="285"></A> <TABLE CELLPADDING=3 BORDER="1"> <CAPTION><STRONG>Table 3:</STRONG> GRASS Digitizing Tools</CAPTION> <TR><TH ALIGN="LEFT"><SPAN CLASS="textbf">Icon</SPAN></TH> <TH ALIGN="LEFT"><SPAN CLASS="textbf">Tool</SPAN></TH> <TH ALIGN="LEFT" VALIGN="TOP" WIDTH=360><SPAN CLASS="textbf">Purpose</SPAN></TH> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_new_point</TD> <TD ALIGN="LEFT">New Point</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Digitize new point</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_new_line</TD> <TD ALIGN="LEFT">New Line</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Digitize new line (finish by selecting new tool)</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_new_boundary</TD> <TD ALIGN="LEFT">New Boundary</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Digitize new boundary (finish by selecting new tool)</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_new_centroid</TD> <TD ALIGN="LEFT">New Centroid</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Digitize new centroid (label existing area)</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_move_vertex</TD> <TD ALIGN="LEFT">Move vertex</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Move one vertex of existing line or boundary and identify new position</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_add_vertex</TD> <TD ALIGN="LEFT">Add vertex</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Add a new vertex to existing line</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_delete_vertex</TD> <TD ALIGN="LEFT">Delete vertex</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Delete vertex from existing line (confirm selected vertex by another click)</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_move_line</TD> <TD ALIGN="LEFT">Move element</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Move selected boundary, line, point or centroid and click on new position</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_split_line</TD> <TD ALIGN="LEFT">Split line</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Split an existing line to 2 parts</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_delete_line</TD> <TD ALIGN="LEFT">Delete element</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Delete existing boundary, line, point or centroid (confirm selected element by another click)</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_edit_attributes</TD> <TD ALIGN="LEFT">Edit attributes</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Edit attributes of selected element (note that one element can represent more features, see above)</TD> </TR> <TR><TD ALIGN="LEFT">[width=0.7cm]grass_close_edit</TD> <TD ALIGN="LEFT">Close</TD> <TD ALIGN="LEFT" VALIGN="TOP" WIDTH=360>Close session and save current status (rebuilds topology afterwards)</TD> </TR> </TABLE> </DIV> <BR> <P> Category Tab<A NAME="307"></A> <P> The Category tab allows you to define the way in which the category values will be assigned to a new geometry element. <P> <DIV ALIGN="CENTER"><A NAME="fig:grass_digitizing_category"></A><A NAME="311"></A> <TABLE> <CAPTION ALIGN="BOTTOM"><STRONG>Figure:</STRONG> GRASS Digitizing Category Tab </CAPTION> <TR><TD> <DIV ALIGN="CENTER"> [clip=true,width=10cm]grass_digitizing_category </DIV></TD></TR> </TABLE> </DIV> <P> <UL> <LI><SPAN CLASS="textbf">Mode</SPAN>: what category value shall be applied to new geometry elements. <UL> <LI>Next not used - apply next not yet used category value to geometry element. </LI> <LI>Manual entry - manually define the category value for the geometry element in the 'Category'-entry field. </LI> <LI>No category - Do not apply a category value to the geometry element. This is e.g. used for area boundaries, because the category values are connected via the centroid. </LI> </UL> </LI> <LI><SPAN CLASS="textbf">Category</SPAN> - A number (ID) is attached to each digitized geometry element. It is used to connect each geometry element with its attributes. </LI> <LI><SPAN CLASS="textbf">Field (layer)</SPAN> - Each geometry element can be connected with several attribute tables using different GRASS geometry layers. Default layer number is 1. </LI> </UL> <P> <BR> <IMG WIDTH="251" HEIGHT="11" ALIGN="BOTTOM" BORDER="0" SRC="img5.png" ALT="\begin{Tip} % latex2html id marker 323 \caption{\textsc{Creating an additional G... ...Table tab you can create your new table connected to your new layer. } \end{Tip}"> <BR> <P> Settings Tab<A NAME="label_settingtab"></A><A NAME="329"></A> <P> The Settings tab allows you to set the snapping in screen pixels. The threshold defines at what distance new points or line ends are snapped to existing nodes. This helps to prevent gaps or dangles between boundaries. The default is set to 10 pixels. <P> <DIV ALIGN="CENTER"><A NAME="fig:grass_digitizing_settings"></A><A NAME="333"></A> <TABLE> <CAPTION ALIGN="BOTTOM"><STRONG>Figure:</STRONG> GRASS Digitizing Settings Tab </CAPTION> <TR><TD> <DIV ALIGN="CENTER"> [clip=true,width=8cm]grass_digitizing_settings </DIV></TD></TR> </TABLE> </DIV> <P> Symbology Tab<A NAME="339"></A> <P> The Symbology tab allows you to view and set symbology and color settings for various geometry types and their topological status (e.g. closed / opened boundary). <P> <DIV ALIGN="CENTER"><A NAME="fig:grass_digitizing_symbology"></A><A NAME="343"></A> <TABLE> <CAPTION ALIGN="BOTTOM"><STRONG>Figure:</STRONG> GRASS Digitizing Symbolog Tab </CAPTION> <TR><TD> <DIV ALIGN="CENTER"> [clip=true,width=8cm]grass_digitizing_symbology </DIV></TD></TR> </TABLE> </DIV> <P> Table Tab <A NAME="349"></A> <P> The Table tab provides information about the database table for a given 'layer'. Here you can add new columns to an existing attribute table, or create a new database table for a new GRASS vector layer (see Section <A HREF="node9.html#sec:creating_new_grass_vectors">9.6</A>). <P> <DIV ALIGN="CENTER"><A NAME="fig:grass_digitizing_table"></A><A NAME="354"></A> <TABLE> <CAPTION ALIGN="BOTTOM"><STRONG>Figure:</STRONG> GRASS Digitizing Table Tab </CAPTION> <TR><TD> <DIV ALIGN="CENTER"> [clip=true,width=10cm]grass_digitizing_table </DIV></TD></TR> </TABLE> </DIV> <BR> <P>
GRASSベクターレイヤのデジタイズと編集
に戻る。
案内メニュー
表示
ページ
議論
ソースを表示
履歴
個人用ツール
アカウント作成
ログイン
案内
メインページ
最近の更新
おまかせ表示
ヘルプ
検索
ツール
リンク元
関連ページの更新状況
特別ページ
ページ情報