LibreDWGによるAutoCAD DWGファイルからのtext抽出

installし、単に dwggrep を実行しただけです。

文字情報の抽出精度?は、確認していません

参考url

• https://www.gnu.org/software/libredwg/
• https://github.com/LibreDWG/libredwg
• https://medium.com/@gaganjyot/libredwg-installation-on-linux-f31cf9a2fdff

install

$ cat /etc/redhat-release 
Red Hat Enterprise Linux release 8.7 (Ootpa)

## for python binding
$ sudo yum install swig

$ wget https://ftp.gnu.org/gnu/libredwg/libredwg-0.12.5.tar.gz
$ ./configure
$ make
$ make check
$ sudo make installation

$ sudo ldconfig

$ ls -l /usr/local/bin/dwg*
-rwxr-xr-x 1 root root 213912 Feb 16 15:33 /usr/local/bin/dwg2dxf
-rwxr-xr-x 1 root root 282488 Feb 16 15:33 /usr/local/bin/dwg2SVG
-rwxr-xr-x 1 root root 304912 Feb 16 15:33 /usr/local/bin/dwgadd
-rwxr-xr-x 1 root root 204736 Feb 16 15:33 /usr/local/bin/dwgbmp
-rwxr-xr-x 1 root root   1787 Feb 16 15:33 /usr/local/bin/dwgfilter
-rwxr-xr-x 1 root root 404768 Feb 16 15:33 /usr/local/bin/dwggrep
-rwxr-xr-x 1 root root 202248 Feb 16 15:33 /usr/local/bin/dwglayers
-rwxr-xr-x 1 root root 204112 Feb 16 15:33 /usr/local/bin/dwgread
-rwxr-xr-x 1 root root 208160 Feb 16 15:33 /usr/local/bin/dwgrewrite
-rwxr-xr-x 1 root root 217280 Feb 16 15:33 /usr/local/bin/dwgwrite
$ ls -l /usr/local/bin/dxf*
-rwxr-xr-x 1 root root 208144 Feb 16 15:33 /usr/local/bin/dxf2dwg
-rwxr-xr-x 1 root root 219336 Feb 16 15:33 /usr/local/bin/dxfwrite

dwggrepコマンドによるテキスト抽出

$ /usr/local/bin/dwggrep --version
dwggrep 0.12.5

$ /usr/local/bin/dwggrep --help
Usage: dwggrep [OPTIONS]... pattern files
Search regex pattern in a list of DWGs.
  -i                        Case-insensitive pattern
  -x                        Extended regex pattern
  -c, --count               Print only the count of matched elements.
  -h, --no-filename         Print no filename.
  -y, --type NAME           Search only NAME entities or objects.
  -d, --dxf NUM             Search only DXF group NUM fields.
  -t, --text                Search only in TEXT-like entities.
  -b, --blocks              Search also in all block definitions.
      --tables              Search only in table names.
      --help                Display this help and exit
      --version             Output version information and exit

GNU LibreDWG online manual: <https://www.gnu.org/software/libredwg/>

$ /usr/local/bin/dwggrep . cad-data.dwg

cad-data.dwg DICTIONARY 3: ACAD_2007HEADERVARS_RT
＜略＞
cad-data.dwg DICTIONARY 3: Normal
＜略＞
cad-data.dwg DICTIONARY 3: A3横
＜略＞
cad-data.dwg STYLE 2: 2.5mmＭＳ ゴシック
＜略＞
cad-data.dwg LTYPE 3: Hidden __ __ __ __ __ __ __ __ __ __ __ __ __ _
cad-data.dwg LTYPE 3: Phantom (.5x) ___ _ _ ___ _ _ ___ _ _ ___ _ _
cad-data.dwg LTYPE 3: Center ____ _ ____ _ ____ _ ____ _ ____ _ ____
＜略＞
cad-data.dwg TEXT 1: Ｄ矢視図
cad-data.dwg TEXT 1: Ｂ矢視図
cad-data.dwg TEXT 1: Ｃ矢視図
cad-data.dwg TEXT 1: 断　面　図
cad-data.dwg TEXT 1: 壁
＜略＞
cad-data.dwg ATTRIB 1: Ｗ　総組時