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Urban Network Analysis: A Toolbox for ArcGIS 10 / 10.1 The City Form Lab has released a state-of-the-art toolbox for urban network analysis. As the first of its kind, this ArcGIS toolbox can be used to compute five types of graph analysis measures on spatial networks: Reach; Gravity; Betweenness; Closeness; and Straightness. http://vimeo.com/44728530 The tools incorporate three important features that make them particularly suited for spatial analysis on urban street networks. First, they can account for both geometry and topology in the input networks, using either metric distance (e.g. Meters) or topological distance (e.g. Turns) as impedance factors in the analysis. Second, unlike previous software tools that operate with two network elements (nodes and edges), the UNA tools include a third network element - buildings - which are used as the spatial units of analysis for all measures. Two neighboring buildings on the same street segments can therefore obtain different accessibility results. And third, the UNA tools optionally allow buildings to be weighted according to their particular characteristics - more voluminous, more populated, or otherwise more important buildings can be specified to have a proportionately stronger effect on the analysis outcomes, yielding more accurate and reliable results to any of the specified measures. The tools are aimed at urban designers, architects, planners, geographers, and spatial analysts who are interested in studying the spatial configurations of cities, and their related social, economic, and environmental processes. The toolbox is built for easy scaling - it is equally suited for small-scale, detailed network analysis of dense urban areas as it is for sparser large-scale regional networks. The toolbox requires ArcGIS 10 software with an ArcGIS Network Analyst Extension. Download: http://cityform.mit.edu/files/Urban%20Network%20Analysis%20Tool.zip Help: http://cityform.mit....es/UNA_help.pdf Credits: Andres Sevtsuk, Michael Mekonnen. Please send your comments, questions, and feedback to [email protected]

I apologize if this is in the incorrect forum, but I need to vent. Dear Trimble & ESRI, I have a few rants to make and I'll try to keep it professional, however through years of neglect and ignoring users, it may be increasingly difficult to keep this letter civil. Sometimes I feel as if I'm the only GIS professional who absolutely abhors Trimble field collection units. Everytime I go to an ESRI user conference or trade-show I always ask the same questions of ESRI and Trimble; namely why is their hardware and software so out-dated and why do they persist in charging extraordinary amounts of inferior hardware. It is 2012 and I expect the following from a mobile device: Processors and Computing Power Machines that are being used in a professional capacity SHOULD have professional-grade performance. Currently, the Trimble units I have seen/used contain woefully inadequate hardware specifications for the purpose they are being used for. Currently, RAM is indicated as being acceptable at 256MB. The universal explanation given for this is that the software running on the Trimble units is so efficient that more RAM isn't necessary to make things run smoothly. Internal flash storage is being touted as acceptable at 2GB... yup... 2GB. WTF! Is this 1999??? Am I the only one here who feels this is unacceptable? The single-core processor (TI OMAP 3503) is actually pretty good, however, it isn't utilized AT ALL in the Trimble units. One needs to wonder why a processor capable of good 3D-rendering, 3D-mobile gaming and so much more is wasted in the current flock of Trimble units? One interesting scenario I had with a colleague involved his Trimble unit and ArcPad running slowly and freezing. It seems he had a rather large amount of data on his unit as well as raster imagery. Obviously it would run slowly and as I explained this to him he said "Well my phone can probably handle it". So we did a test and I put the same data on his phone with a small customized android application that contains the features he would use. He was right... oh was he right. This got me thinking... if I spend a few thousand dollars on field units, shouldn't they be able to load larger amounts of data? Instead of having to create data on a project-by-project basis? Maybe its not practical, but if other technologies that are significantly cheaper can do it?.... Specs: For about $1500 you will get this great value! RAM: 256MB Memory: 2GB (BUT YOU CAN USE A SDHC CARD UP TO 32GB!!!!!!! YAYYYYY!!!!) Processor: TI OMAP 3503 Screen: 480px x 640px Camera: 5mp Weight: 2lbs Compare that everything else and you'll find its a bit embarrassing. Display I hate Trimble displays. I hate them. They are terrible in every way. My 4 year-old mp3 player has a better display. The displays are dull and although they say they can be viewed outdoors, it's all relative. On a cloudy day or in to day of course they can be seen, but in a sunny day? Not a chance. The "upgrade" to a 480 x 640 display does absolutely nothing as it is now crap with a larger screen. I am still waiting for Trimble displays to similar to phones or tablets. I want saturated colours and deep blacks for easier viewing. I don't care too much about colour accuracy on a field machine. Of course this means more drain on the battery, but that isn't my problem is it? The technology is there. Phones and tablets use it and can last all day. The two reasons I was given for the display being the way it was are: weather resistance, and battery life. Seriously??!!!!! I can take my regular Asus laptop to construction sites and field visits and no problems. My nexus 7 has been out in rainy conditions to wetland inventories and fish sampling... never a problem. The bottom line is 99% of field crews aren't going to Antarctica!!! As far a battery life... well, I find that a little hard to believe. Stylus Really?? We need a stylus in 2012?? I mean, it should be an option, but require it? Its like sending crews out with fanny-packs. Users want to option of using their fingers. They want gestures and swypes because thats what they are used to. They should have to reinvent the wheel when coming to work. Its inefficient design. Software Trimble units run on old Windows mobile. Remember that old windows mobile phone you used to have and thought it was the bomb until 6 years ago when you evolved with the rest of the human race? I remember it. Those were painful memories. Depending on your flavour, you will either have ArcPad or TerraSync installed with GPS-correct (for differential). ArcPad is just plain god-awful in every way. It is clunky and not user-friendly. It needs to be severely customized to be more efficient (this takes time and man-power) and it suffers from cramming to many things onto a small toolbar on a low-resolution screen. Don't you just love those tiny black arrows indicating there are more options under and icon. Its a challenge just pressing them. TerraSync is actually a little better, but the work involved is just as great as it doesn't support geodatabase domains or check-in, check-out options (these need to be done manually). I understand the ESRI and microsoft have an agreement in place and that windows mobile is part of that, but installing older windows mobile greatly limits what hardware can be placed in a machine. I for one am happy that ESRI is in the process of phasing out its inclusion of Bing Maps for its products (10.1 is the last ArcGIS release that will include Bing Maps) if it means that they are starting to distance themselves from microsoft a bit. Hopefully this will allow much more flexibility in software and hardware design as well as being able to develop complete field solutions for other platforms.. not solutions that require an internet connection (this is ridiculous as a lot of field work is done in areas with no internet connection). Camera Even the camera on Trimble units are sub-par. Phones and tablets are using much higher-grade lenses and produce much higher quality images. This isn't a huge deal, but once again and one spends thousands of dollars one should get what they pay for. Size and Weight The size and weight of these units are a real turn-off as well. They remind me of portable phones in the late eighties. Remember the one that Gordon Gecko uses in Wall Street?! Yup, thats a Trimble unit now. I know they need to make these things apocalypse-proof, but 2 pounds? Really!!!? Imagine what Steve Jobs would say... *Note* I recently put all field staff on a workout regiment (cross-training) so they don't get tired hefting their portable computing device out into the field... Overall There is always a damper put on field visits with clients or associates whenever someone pulls a Trimble unit out. Usually this has to do with inevitable delays, software hang-ups, poor knowledge of what the unit can handle (not necessarily Trimble or ESRI's fault). Staff shouldn't need to be trained for an hour before going out into the field to collect data. In fact most of our staff prefer to use tablets, ultrabooks or smartphones now to collect data. Most field crews aren't surveyors and don't need absolutely precise locational information and prefer speed and ease of use. For the last 4 years I've made complaints at the ESRI user conference about this and haven't had much luck or support from the ESRI faithful. Don't get me wrong, I actually love a lot of ESRI products. They are powerful and can do a lot once you've learned how to use them, but that's the problem. Staff should be able to pick one up and INSTINCTIVELY have a rough idea of how things work (thats good design). Instead they need training sessions and manuals. So far I've managed to convince my employer not to purchase any more trimbles and go with phones and tablets. Its the best decision we've ever made. Custom applications need to be created, but they are far easier to use in the long run and users don't really need any training. ArcPad is really for GIS professionals that need to have more advanced features out in the field, however many places can't afford to have GIS people doing field work (they are in the office), so the collection falls to field staff. Sincerely, A GIS Professional Who Will NEVER willingly purchase another trimble unit or arcpad license until you've evolved.