Hot answers tagged

14

I have been using a wacom tablet with ArcGIS for the past 5 years and have found it to be incredibly useful. I have only used the Intuous 3 (A4) but the ability to program the 8 shortcut keys as well as the trackpads has saved countless repetitive hand trips to the keyboard - and when you are capturing a lot of little areas of data this can be quite some ...


13

Check the CadTools plugin. It offers orthogonal line tools. This screencast titled "Orthogonal Digitizing" should be of special interest for you: http://blip.tv/stefan-ziegler/orthogonal-digitizing-3049738 (this video is not longer available, see @Kurt's link to the tutorial)


13

Is it really necessary to oppose both solutions, and choose between them? Some users feel better with paper, some others with a GIS. It depends on their skills, what they need to do, if they have a computer (with Internet), their mood, and certainly many other implicit factors we cannot guess. My advice: try to convince that both solutions should be ...


10

As other people have said, I don't think that you can rule out either case. I think that the solution depends on: The users. Are they comfortable with the tech or not. The Use case. Are they in the field in an area without network connectivity or not conducive to bringing expensive tech. The solution/app are people still building ArcMap on a Web page ...


10

I would suggest talking to your local university or college. I work in a Geography department at a university in the geospatial data centre and we are doing a similar project with aerial photography for our local city. Universities can hire students, or make it apart of the class work. Many profs like the chance to tie their teaching to real world ...


10

You should be able to use the Arrow At End symbol from the Symbol Selector to show the digitised direction of polylines.


9

I think the winner between on screen digitizing and sketching on a piece of paper depends a lot. It is possible to make a lot more precise and accurate digitizing on screen than on paper with the right background maps and the right tools. But I understand what you meen by saying that it tends to be more precise on paper. To get the good accuracy on screen, ...


8

I use mine all the time with ArcGIS Desktop. The learning curve isn't as steep as you'd think. It becomes much more natural to draw on the canvas than trying to use a mouse. I've noticed that ArcGIS 10 seems designed for the Wacom tablets so it makes it very easy to work with. My productivity goes up using the Wacom tablet, the quality of my work goes up ...


8

Tough one Chad. I suspect not as a first guess. The contours are quite 'light' and the graticule lines are very thick/heavy. You will likely end up with a poor set of results. However, I can run a quick trial for you and let you know! EDIT: Results of a trial: Works better than I thought, and that was without much initial cleanup. Doing the "GIMP" step ...


8

While I agree that there are much better tools to accomplish this task, I'll give it a go just for the sake of answering the question, as cumbersome as it may be. It is still going to take a good deal of manual effort, but at least you can knock out multiple doorways at once this way. Basically, you can create point features wherever your doors are, ...


8

There is no need to manually digitize all the OSM Maps. According to the OSM website OpenStreetMap is a map of the world, created by people like you and free to use under an open license. So you are able to use the underlying data in all the maps, Simply download what you want to use, following the steps in this guide or this one.


7

You can use GDAL to read Geospatial PDFs (as of version 1.8.0). Even if you don't have the PDF georeferenced GDAL can read the image and transform it to whatever spatial system you need. Then you can read it into whatever GIS you need (as @Chethan S. suggests, Quantum is a good free one). Choosing the coordinate system is a bit more difficult, and it's not ...


7

The QGIS solution in Mapperz' reply is just a simple raster to vector conversion and has no edge detection, so I doubt it would be very effective for this use-case. It will give you polygons per pixel value and for a photo that could result in almost a polygon per pixel! A better option in QGIS might be to use the Edge Extraction feature in the Sextante ...


7

Ok, so after a frustrating week, I've actually found a few new things out about QGis. Cheifly, I was still using version 2.2.0 when I posted this question, I've since upgraded to 2.8.1. What follows is a little bit of a tutorial for those folks who might be looking to tackle the same problem. The solution for me was a plug-in called cadinput by Oliver ...


6

I am not sure if the impact on the environmnet would be less with using an online application. Based on my own experiance people will likely print out the digital version, draw their design on the paper then replicate it on the digital map. How many users are we talking about? In our company of about 120, I usually send people a PDF map then let them use ...


6

the CadTools plugin should do what you want. there is also an tutorial: http://www.catais.org/qgis/cadtools/ (especially look under "orthogonal digitzing")


6

Maybe the answers to this question are helpful: How to simplify a routable network? I used GRASS v.clean in the end.


6

There are many options for you in ArcGIS, however I would stay open to open-source solutions too. You can purchase an extension for ArcGIS called Feature Analyst, which uses a feature extraction algorithm. Otherwise, try Iso Cluster Unsupervised Classification (Spatial Analyst) on 4-band DOQ's (Earth Explorer). Once you find the right recipe for ...


6

ArcMap (10.2) Use ArcScan http://resources.arcgis.com/en/help/main/10.2/index.html#//000w00000001000000 but you have to change you image to 8 bit black and white for automatic vectorisation. Note lots of images require clean-up this can be the time consuming component. ...


6

Yes, manual digitization is slow. There's a reason why scanning and raster-to-vector processing has replaced digitizing in major paper map conversion efforts. Twenty-five years ago, half of Esri's employees toiled at 4-hour shifts on digitizer boards or worked at QC tasks reviewing data collection. Now there may be a few large boards left, but they're ...


6

I'm assuming you want to automatically populate the field with the date at which the feature was edited - apologies if this is not correct. Create the shapefile and add a field in the attribute table in which to store the date - you should be able to specify "date" as the type of input. Add the shapefile into QGIS and then open its properties. Under the ...


5

Another solution is you use the plugin azimuth and distance. http://geotecnologias.wordpress.com/2012/02/03/criando-poligonal-por-azimute-e-distancia-qgis/


5

You can chose between CAD Tools plugin which is more complex and more powerful, or Rectangles ovals digitizing plugin. ***This is my add-on: after install the plugin you may have trouble to locate the plugin tool icon or buttons. Please look for the plugin tool icons on you Qgis software panel, they are probably in grey color. I attached the photo as ...


5

I agree with Alice and Stephen. If they will not share the data, then you are out of luck. You could argue that if they had not disabled directory browsing of their REST endpoints, then whats to stop you from hitting the unsecure service endpoints with a query like this to pull back the points your after (also with the choice of asking for them to be ...


5

The Reshape Feature Tool can be helpful for this job. Draw the new common border of the polygons (here in red color):


5

Although i hate giving link-only answers your question literally calls for it. If you have absolutely no idea how to start you should definitely read some tutorials first. The purpose of this site is to help you with GIS problems and not to teach you how to work with GIS-software! IMHO this requires to take ether a professional course or a lot of spare time ...


5

Since you mentioned that are you doing network analysis, I recommend assigning the symbology for your road edges within the network dataset layer in the TOC instead. You are on ArcGIS 10.2, so here are the steps: Add the network dataset into the ArcMap TOC. Open the Layer Properties dialog box by double-clicking the network dataset layer in the ArcMap ...


5

The v.split.length function from GRASS should do exactly what you want by splitting the line into equal segments defined by the user without the need for a point layer. Here's a simple example of a straight line (it also works on non-straight and multiple lines): I added a column to calculate its length using $length in the expression: Using the ...


5

Not at all. When you have some data that was digitized at 1:100,000, it excluded smaller features, which were smaller than the Minimum Mappable Area. For example, suppose you are dealing with topographic data.At 1:100,000 you would exclude large streams and trees.These features are visible at 1:24,000, and should be included in such a map. If you just ...


4

Your Draftsman could use the Direction Distance Tool, that you find "under" the Sketch Tool button. The symbol on the button is a circle with a crossing line. To use the tool: Set your Target to you Lighting Post and then: Set snap (edge/vertex) to your curb layer (Editor button -> Snapping). Choose the Direction Distance Tool. Click the position on the ...



Only top voted, non community-wiki answers of a minimum length are eligible