The digitizing tag has no wiki summary.
1
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1answer
28 views
using the “freehand” construction tool
I am drawing hydro features with the freehand tool. Does anyone know how to delete vertices (i.e. back up) in ArcMap 10 while drawing with freehand in the construction tools? I was just curious if ...
3
votes
2answers
69 views
ArcGIS Heads up digitizing - Rooms and doors
I am digitizing the floorplans of various schools in our county. This is for the Fire Department so they want to be able to see where doors are within the building. The doors do not necessarily have ...
5
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2answers
83 views
Any Piri Reis shapefiles?
Incredible claims have been made about a map named after its creator (Piri Reis).
I was looking into digitizing the map and overlaying it with a modern map of the world, specifically the east coast ...
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votes
1answer
87 views
How to digitize a map in QGIS?
I am relatively new to QGIS and using it on windows vista.
Problem:
I have to digitalise an aerial map and then extract the coordinates.
I have absolutely no idea how to start
Thanking you in ...
1
vote
1answer
47 views
Digitized vectors don't match while zooming [duplicate]
I'm trying to digitize in QGIS with Google Maps as the background. Digitizing with constant zoom works fine. But if the zoom is changed, the digitized vectors don't match the Google Maps background ...
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2answers
73 views
How to make digitization more detailed afterwards with QGIS?
I digitized already two areas, bordering each other on one side.
Than I realized, more detail was needed!
What do you suggest as a fast way to do so?
Adding each time new dots/verteces takes so ...
3
votes
2answers
88 views
I am unable to draw a shape layer
When I add a new shape layer or want to edit an existing one, nothing is happening. I even don't see the dots where I'm clicking.
Maybe the problem is I deleted some layers (by opening the .qgs as a ...
1
vote
0answers
51 views
When digitizing, objects are not saved well
I've some problems with digitizing.
If I draw a line or a polygon, the line or polygon is saved in the attribute list, but not visible and its location is not saved either (when I zoom to the object ...
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votes
2answers
147 views
Digitizing from OpenLayers Plugin in QGIS, or create raster?
Is there an easy method for digitizing from a layer added from the OpenLayers pluggin. As i cannot snap to it or use it as raster so the entire map does not load?
two separate issues there.
3
votes
1answer
70 views
digitizing (tolerence) error in line data
I have designed a large number of boundaries. For accuracy, I took lines in patches from different data sets and merged them into one. Now I want to turn them into polygons from lines. I every second ...
1
vote
4answers
271 views
How to Digitize Free Satellite Imagery in QGIS?
I am trying to digitize OpenLayers data (such as Google satellite imagery) with no success. Whenever I try to move or zoom the canvas the vector layer I digitized loses the position relative to the ...
7
votes
1answer
210 views
How to rectify polygon-shapes in Quantum-GIS? [duplicate]
I have some polygon-shapes in qgis-1.7.0 and want to ensure that every polygon is a rectangle. See image below.
Is there any way I can do this in quantum-gis (or any other f/oss)? Or how can I ...
3
votes
0answers
88 views
How to digitize 90 degree angles? [duplicate]
Possible Duplicate:
How to create polygons with straight lines and right angles in QGIS?
In QGIS 1.8 is there a way to digitize buildings etc. with perfect 90-degree angles, Or, edit a ...
1
vote
0answers
152 views
When I finish drawing a polygon, it disappears again (although appearing in my attribute table)
I'm working with Quantum GIS at this moment. And as the title says, when I finish drawing a polygon, it disappears again. The new object does appear in my attribute table and in the legend/'filling of ...
0
votes
2answers
132 views
Harvest data from an ArcGIS Server
I would like to include some state agency data in an application I am creating. The agency will not share the data so I have to find another approach. What I am interested in are the points on the ...
9
votes
3answers
325 views
How to outsource scanning and georeferencing maps?
We have some historical paper maps and we want to get them scanned and geo-referenced and ultimately make a seamless map for a particular time. What vendors supply this service? (I have found ...
0
votes
2answers
258 views
How do you auto populate a field when a new point feature is digitized?
Is there a way to populate a field automatically when a new point is dropped on the map?
We have our map in State Plane Feet, and we want to the database to automatically add WGS xy
coordinates to ...
3
votes
3answers
519 views
How to digitize polygons from georeferenced raster file
I used QGIS to georeference a raster file of a custom US map. The map has features which are not strictly defined by state borders. I would like to digitize the map by creating contiguous borders for ...
2
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3answers
380 views
Looking for an efficient way of digitizing building footprints using orthophotos and ArcGIS 10
In the past I've used PCI Geomatica to do something similar using the softwares classification functionality. Are there some tools/tricks in ArcGIS that will partially automate the process. I remember ...
1
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0answers
119 views
Polygons of Land Use Change
I am doing a project where I am digitizing a map of Haiti from the 70s. Through R2V I digitized the lines and then I exported it into ArcGIS 10. I am just interested in the land use change, therefore, ...
4
votes
2answers
3k views
snapping polygons and lines
I recently downloaded QGIS on a Mac OSX 10.7.4 (lion) and purchased a master map shape file, of a particular area.
I am trying to divide it into polygons following features on the master map vector ...
4
votes
0answers
369 views
Does QGIS have these CAD editing functions?
I tried QGIS for the fist time today and it seems quite capable for the task that I have in mind. However, I really miss some basic editing functionality from another GIS software that I have to use ...
5
votes
1answer
979 views
How to capture a rectangle within the Quantum GIS software?
I want to use "capture polygon" function in QGIS software to draw the indoor office cubical which is a rectangle shape. But the "capture polygon" function is not able to draw a perfect rectangle ...
4
votes
1answer
557 views
Is there a way to automatically snap loose points of lines to close by vertices with Quantum GIS?
I have a vector layer of lines that were drawn with the snapping option off. I need to have them snapped but, there are hundreds of lines. Is there any solution to do this automatically or ...
6
votes
2answers
1k views
How to extract road and building features from raster data?
I work with raster data and my task is to digitize a big image. This consumes much time just for digitizing roads and buildings!
I'm looking for tools to simplify working on raster data to digitize ...
7
votes
3answers
1k views
How to create polygons with straight lines and right angles in QGIS?
I am running QGIS 1.7.0 on Mac OS X 10.6.8.
When creating a polygon, how do I do it so that the lines are straight (90, 0 degrees, etc.) and when I create corners they can be right angles?
For ...
13
votes
7answers
2k views
Is it easy to digitize in ArcGIS using the Wacom tablet?
I do just enough digitizing (and touching up/ drawing when post-processing) to perhaps warrant the purchase of a Wacom tablet. Just wondering how well it plays with ArcGIS. What are your experiences? ...
6
votes
7answers
1k views
How can I digitize a PDF image?
I have an image file in pdf format which includes some drawings (lines, closed areas, and points). I want to digitize it into a shapefile so that I can show it on a Google map. I have a couple of ...
3
votes
3answers
505 views
How do I draw on a vector map in GRASS?
I have a vector map that has two lines. I want to have the two connected. Is there a way for me to draw a line to connect the two? I am using GRASS gis by the way. The two lines that I want to connect ...
9
votes
2answers
630 views
How can I digitize features on an Y,Z plane in ArcGIS?
How can I geo-reference and digitize features on a Y,Z plane of a vertical cross-section in ArcGIS?
The surface coordinate system is NAD 83 UTM 15.
This is a simplified version of the question found ...
7
votes
1answer
637 views
GRASS - Will r.to.vect work on this scanned map?
Total GRASS noob here. I have several very large hand contoured maps to digitize, and this thread intrigues me. In the past I have spent hours upon hours digitizing these maps and revisions in ArcMap. ...
5
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4answers
768 views
Editing with auxiliary features (lines, points etc.) in Arcgis 9.3.1 - How?
In order to digitize exact features in arcgis 9.3.1, our draftsman would like to use auxiliary features (lines and points mostly) that don't have to be saved later on. I told them the easiest way was ...
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6answers
391 views
The general public and their ability to use GIS applications - do we still need paper maps?
I am endeavouring to convince others in my organisation that GIS tools, in particular digitising tools, CAN be used by the general public and we should promote their use instead of using paper maps. ...
