The vectorising tag has no wiki summary.
2
votes
2answers
63 views
How to make mapable geo data from a solid jpg/png
I have a bunch of hardiness zones, as you can see here: http://mangoly.herokuapp.com/workroom/googlemaps/zones/
They are solid colored PNG images. I know the geo coordinates of the bottom left hand ...
3
votes
1answer
205 views
How to convert jpg file to shapefile?
I am developing a GIS application like this:
By now my steps are:
I have got a jpg file, 5040 x 8179 dimension. In this map, the roads, rivers, towns etc. are marked.
I am using .Net to develop ...
2
votes
4answers
300 views
ArcInfo Grid ASCII to ESRI Shapefile conversion
I have an ArcGIS grid ascii file (Ramankutty Cropland at 5 minute resolution) that begins as follows:
ncols 4320
nrows 2160
xllcorner -180
yllcorner -90
cellsize ...
5
votes
3answers
305 views
Raster to vector conversion
I have a bunch of raster maps from a general plan of a city.
Examples:
Areas reserved for federal, regional and municipal buildings
Special land use zones
Zoning
Risks of occurrence of emergencies
...
5
votes
1answer
107 views
Calc bottomline of valleys
Which way do I calculate bottomlines of valleys or even more preceise:
which way do I "find" valleys (for example suggested tectonic faults).
Sample below shows a height profile (profile from line) ...
9
votes
3answers
324 views
How to “clean” and vectorize a raster map?
I'd like to make use of a geological map as shown in the example below, which is only a pretty small and downsized part of the map, so editing/redrawing doesn't seem to make sense in the end.
My idea ...
6
votes
1answer
197 views
Generalize large polygon-file
I have a large polygone file with landuse information (6 classes). Its vectorised from a raster classification so the polygons are all angular. Any of my tries to generalize with v.generalize (sneaks, ...
5
votes
2answers
638 views
How to smooth large vector polygons from Raster
I have a landuse classification raster file (6 classes) of a large area. But I need it in vector polygons so I vectorised it. No problem so far, but the result is - of course - that every pixel is ...
4
votes
4answers
416 views
How to generalize and vectorize a LandUseClassification raster file?
I want to vectorize that rasterfile with its 6 landuse classes. The classification is very noisy and have to be generalized before.
The result should be a polygone vector file.
I use SAGA, (GRASS) ...
2
votes
1answer
343 views
Convert 3-band raster imagery to distinct vector zones in ArcGIS
So much like the title says I would like to convert a 3-band infrared image TIF file of vegetation into distinct vector feature zones using ArcGIS. I'm guessing the only way to do this is with ...
3
votes
1answer
495 views
Selecting and extracting data from TIFF files
I have some tiff files (2 for example) and a shapefile.
The real format of the tiff files is geoTiff.
I want to get the points inside the shape boundary. Each point should have 4 parameters: ...
2
votes
2answers
128 views
River drain: r.watershed to vector is not working
I want to vertorize the result of r.watershed (accumulation). After using r.to.vect I got the message that I have to use r.thin before. So I did, but the message comes again and again.
What I am ...
2
votes
2answers
657 views
How to vectorize a Raster-Classification? (qgis, grass)
I classified my raster-DHM into elevation levels using colormap. Its not a "real" classification, just a colormap. So I cant vectorize the classes to get polygones for every class.
Whats the best ...
4
votes
1answer
585 views
Convert image in KMZ to polygon
I have a KMZ file that contains several image overlays (RF coverage plots).
I would like to convert the image overlays to polygons to decrease loading time in Google Maps.
Currently I'm tracing a ...
2
votes
3answers
5k views
Raster to Shapefile (Polygon)
Have you experienced converting a polygon from raster? The raster dataset is a satellite image created from zonal statistics? The problem is when I was converting the raster to polygon errors came out ...
7
votes
1answer
162 views
View data of a particular year in Google Earth
For my region in India, Google Earth tiles belong to different years, 2003 - 2010. I don't mean GE's historical view feature but the imagery updates for different areas my region.
I classify Landsat ...
6
votes
2answers
1k views
Spatial statistics tools : clustering analysis on raster data
I've an apparently simple problem, but i can't find a clear methodology to use.
I'm tasked to delimit "urban areas" by vector convex polygons, using the Gridded Population of the World dataset from ...
18
votes
6answers
3k views
How to convert image of map into vector format?
What is the best way of converting a gif of a map into a vector format, such as a shapefile?
The only relevant parts that I am interested in are the outline of the island so I realize some manual ...
