Hi,
First of all. I need to say thank you to Tyler Mitchell and to the
rest of you that took the time this summer to aid me as I took my
first steps into the geospatial universe. I would not have been able
to do today with your help, and I am very grateful for the fact that
you take time to help a newbie.
I am slowly learning and currently, I am at a point where I am able to
convert my shapefiles between different SRS and also different formats.
Still - the goal of my small project is to make a unix shell script
that use gnuplot to draw a map using data from a CSV file and place
references on the map from geotagged images jpeg images:
http://www.ia-stud.hiof.no/~kjellare/misc/20080915_maps.png
(http://www.ia-stud.hiof.no/~kjellare/misc/20080915_plotmap.sh)
...to ultimately arrive at my own online photo album solution with
embedded maps:
http://www.ia-stud.hiof.no/~kjellare/misc/20080902_programming_goal.jpg
With significant text-filtering efforts, I have been able to get a
small rudimentary map of Norway going, but with a much more detailed
map of Lebaonon on my hands, I would like to see if ogr2ogr could be
used to output what I need directly.
Using ogr2ogr, I have been able to convert a map of the different
regions of Lebanon from UTM to WGS84 using the following command:
ogr2ogr ~/Desktop/Lebanon_cadast.kml cadast_limits.shp -f "KML" -t_srs
epsg:4326
(http://www.ia-stud.hiof.no/~kjellare/misc/20080915_lebanon_cadast_kml.png
)
I could proceed to format the .kml file using sed and awk (basic text-
processing programs in UNIX) to get output in the format I need, where
the different poly-lines are simply divided by a blank line and a
comment:
.
.
.
10.460277557373047 60.025833129882812
10.472221374511719 60.025833129882812
10.487220764160156 60.020828247070312
#Buskerud
8.190235137939453 61.079093933105469
8.203887939453125 61.093887329101562
8.212221145629883 61.100273132324219
.
.
.
...but I would like to use ogr2ogr to output a csv file directly with
only the lon/lat values for the polygons. The following command:
ogr2ogr ~/Desktop/Lebanon_cadast.txt cadast_limits.shp -f "CSV" -t_srs
epsg:4326
...provides me with a file with a bit too much information (and
seemingly also lacking lon/lat references):
AREA
,PERIMETER
,CADAST_LIM
,CADAST_L_1
,ACS_CODE
,CAD_CODE
,ACS_NAME
,CAD_NAME
,ADMIN_CAZA
,CAD_CAZA
,ACS_CD_SP,UN_ID,KADA_NA,MOH_NA1,POP_AREA,POP_SUR1,LOG_SUT,LOG_SUR
11578600.00000000000, 14680.00000000000,2,1,
35511.00000000000,35049,Dayret Nahr El-Kabir,Dayret Nahr El-Kébir,
12.00000000000, 12.00000000000,
35511.00000000000,2,Akkar,North, 0.8, 168.47,
0.17, 34.00
19425900.00000000000, 39285.89843750000,3,30,
35437.00000000000,35046,Machta Hammoud,Machta Hammoud,
12.00000000000, 12.00000000000,
35437.00000000000,3,Akkar,North, 4.6, 99.68,
0.91, 19.00
88091000.00000000000, 78644.79687500000,4,33,
35516.00000000000,35168ND,Mazareaa Jabal Akroum,Akroum,
12.00000000000, 12.00000000000,
35516.00000000000,4,Akkar,North, 0.6, 63.43,
0.16, 16.00
4221400.00000000000, 12320.20019531250,5,35,
35273.00000000000,35013,AAridet Cheikh Zennad,Arida,
12.00000000000, 12.00000000000,
35273.00000000000,5,Akkar,North, 2.1, 99.27,
0.36, 17.00
3346430.00000000000, 12348.29980468750,6,40,
35271.00000000000,35014,Sammaqiyé,Al-Semmakié, 12.00000000000,
12.00000000000, 35271.00000000000,6,Akkar,North, 2.9,
104.59, 0.48, 17.00
2740910.00000000000, 9681.73046875000,7,51,
35263.00000000000,35106,Janine,Janine, 12.00000000000,
12.00000000000, 35263.00000000000,7,Akkar,North, 0.4,
0.00, 0.06, 0.00
.
.
.
I would very much appreciate it if any of you could point me in the
direction of how to use ogr2ogr to filter/convert the information I
need to get to my goal.
Sincerely,
Kjell Are Refsvik
Student - Information Technology
Ostfold University College
Dept. of Information Technology
http://refsvik.no_______________________________________________
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