Here's a little QGIS python function that implements this. It requires the rasterlang plugin (the repository has to be added to QGIS manually).
It expects three mandatory parameters: The points layer, a raster layer (to determine the size and resolution of the output), and a filename for the output layer. You can also provide an optional argument to ...
Simple question, difficult solution.
The best method I know uses simulated annealing (I have used this to select a few dozen points out of tens of thousands and it scales extremely well to selecting 200 points: the scaling is sublinear), but this requires careful coding and considerable experimentation, as well as a huge amount of computation. You should ...
It actually seems very reasonable from a price perspective. I would specify it meets XXXX standard of accuracy and I would specify the file be in las 1.2 (or another spec as desired). Specify the classes you require and the RMSEz that is acceptable (often just vertical in lidar). 7 points per m is high.
I find this document very useful. It spells out what ...
The short version is - Seek professional help.
The longer version:
You appear to have some vague knowledge of what you want to do but certainly don't have the specifics. What you have here is an entire Corporate GIS project and you should go through the Project Management process for it.
What are your requirements? What do you need to connect to what? Who ...
There are a number of places where footprints can come in very handy
Taxation: As @Mapperz said, taxation is one area. The percentage of
property that is built on is sometimes used as a tax criterion.
Planning: Knowing where structures already exist on property can
help in the planning process due to applied setbacks and minimum
Download tiger census block shapefile for your area of interest.
Download American Fact Finder demographic tables to join to your block shapefile.
Create a point shapefile for your long/lat coordinates.
You can then use the Select by Location option to select block features within your buffer distance for each point feature.
Summarize selected features by ...
Distributed GIS concerns itself with GI Systems that do not have all
of the system components in the same physical location. This could be
the processing, the database, the rendering or the user interface.
Examples of distributed systems are web-based GIS, Mobile GIS,
Corporate GIS and GRID computing.
and well, Web GIS ...
The complexity of an online map is widely dependent on several things; first being what api/platform you want to use (CartoDB, ArcGIS Online, Google Maps, etc...).
What API/platform is best to use will be at least partially dependent on several other factors though, such as what licensing restrictions you can work within (ex: most of Google's api's ...
It is usually more meaningful to compare quotes from different providers for the same situation/contract. However, I tried to make a rough comparison with the work of Hummel et al. (2011).
30k CAD / (70 Km² x 247.105 acres/Km²) = $1.73 CAD/acre or $1.92 USD/acre.
(Considering a ratio of CAD/USD = 1.11 in Oct/2014).
Hummel et al. (2011).
They report ...
I would strongly recommend Maptitude as a geospatial software package to meet your spatial analysis needs. I have been a user of the software for about 3 years now, as the software is quite affordable compares to MapInfo and ESRI Business Analyst Online. The software is aimed at the business person who needs to do site selection work, demographic analysis, ...
If you are just looking for data samples for Metropolitan areas and want to try some data out West, you can take a look at data provided (mostly) free by:
City of San Francisco
City of Portland, OR
Portland METRO (Regional Authority)
King County (Seattle), WA
Not sure exactly what you mean by high resolution, but I think your best bet is to trawl the sites of city districts and see if they provide this level of data - it will probably vary by authority.
For instance Massachusetts has data (http://www.mass.gov/mgis/lus2005.htm) with a mimimum mapping unit of 0.25 acres - or approx 11,000 square foot. Probably way ...
It's looks to be a bug introduced...
I would keep an eye on your esri forum post:
And however an esri staff member will reply. May require a patch for the service pack 2.
The methodology you are looking for is called 'spatial statistics', and specifically 'spatial point-pattern analysis'.
You could do a kernel-smoothing of the two point patterns and then compute the ratio of the kernel-smoothings. However, this is sensitive to choice of kernel shape and bandwidth, so if you wanted to draw robust statistical conclusions (...
Conceptually, a good solution can be had by reversing the natural way of thinking about this problem. The question concerns finding all locations with at least 10 of each kind of establishment within a three-block distance. That makes it sound like each location has to be inspected separately, searching three blocks in all directions. Because there are ...
You can get data on specific types of features such as libraries (not necessarly all of them, but at least a good sample) from Open Street Map.
In the case of library, you're looking for things with an amenity tag of library. You can download the OSM data in a lot of ways, but you may find the Overpass API useful. Here is a very simple query you can use:
In addition to the points in the other answers, make sure that you have well defined control points and callibration. You will get the most use out of LiDAR that you can compare from collection to collection. If a company will not provide you with this data, it is best to pay a little more. I have come into a project to find that there is no way to compare ...
As graduate of COGS, I would say that you shouldn't really limit yourself to staying and working in either of those Provinces after you're done your studies.
Each school offers a program that is marketable really anywhere when you're done!
With that said, there were many jobs in Nova Scotia that were offered to prospective COGS grads, and I think a lot of ...
Hey welcome to Canada mate!
I can't say I have specific knowledge here, but I'd say you're probably right with BC's job market being a bit more promising than Nova Scotia's. Here's a real quick breakdown of some provincial economic indicators from Statistics Canada's most recent data (not specific to the GIS industry but gives you an idea of where they're ...
As others have noted, the investment of time really depends on what you want your map to do. A complex, well-designed tool will require a similarly complex back end. The good news is that most of the available tools are highly scalable, meaning you can start for simple, free (or very cheap) optional and build up in the future.
If you have no background in ...
TerraNova MapInfo AnySite® is the premier and preferred location-based software solution from MapInfo.
"you can connect, retrieve, report and map any information from your proprietary database to analyze trade area data quickly, easily and accurately"
(Seen it in action but not used it myself)
This does not directly answer your question in terms of how and/or where to obtain the data, but may serve as some guidance as to why you cannot find it readily available and why the National Association of Realtors does not release the data: MLS Wikipedia Entry
Read the sections entitled Limitations of access and Criticisms of MLS and Policies on sharing ...
You can use google places APIs , the volume of requests for the free version have a limit.
The following example is a search request for places of type 'restaurant' within a 500m radius of a point in Sydney, Australia
I recommend either using the Factual APIs:
Or contacting them and asking them for a download.
For a preview of the data, see here.
Definitely take a look at this: https://rpubs.com/MichalisPavlis/huff_model and the R library hufftools, which also shows exactly how to download and use a street network for an entire country. The Pavlis Dolega and Singleton paper may also be helpful in thinking about the retail "attractor" question.