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I have successfully been using the trace upstream in ArcGIS with 10,000+ points as flags to find what polygons are upstream (using a select of the polygons than intersect the upstream trace). Now I need to know how far upstream a polygon is. That is, I know which polygons are upstream but I...

I wanted to tie toegther some data from my database table to an ArcGis map. The table contained an Object_Id, GIS_LATITUDE and GIS_LONGITUDE column. I added the feature layer based on the table (x as GIS_LONGITUDE, y as GIS_LATITUDE) and was surprised when my points, instead of being based in...

I am using the GEOS/OGR library in Python. I have files full of geometries that overlap, and I want to convert these to files of geometries that don't overlap. The way I have been approaching this is to just read in all of the geometries from a file, and then looping over each geometry and...

Are you ready to fly? In high-resolution imagery collection, UAVs are the latest standout. Join us as we discuss what it takes to collect and process top quality imagery. We’ll run through a sample flight checklist, discuss the importance of control points, and give advice on obtaining imagery...

Bonjour, Je veux créer une recherche de POI par catégorie dans mon site web, tout comme cet exemple (http://maps.skobbler.com/) J'ai une base de données Postgis et j'utilise Leaflet pour l'affichage web, Je souhaite que Leaflet charge les données d'une façon dynamique, c'est à dire...

Behold! I bring you GeoPortal. Again. For the third time. أكثر...

Dear All, Does anyone knows was there any mapping apps could be used for Android OS? I'm currently using Bingmap, OSM and Google map, but looking for something can do it better and faster. BTW, I want to connect my WMS and WMTS server. cheers, أكثر...

I have a dataset of 20 Landsat scenes (MSS, TM, ETM+) for 20 years (one scene per year). Scenes are in WGS 84, EPSG 32634 coordinate system and I can easily project = geometrically correct them to S_JTSK, EPSG 5514, using Project raster Tool (Data Management in ArcGIS 10.1). As my area of...

Ok, so with ArcGIS 10, ESRI has depricated 'Address Standardizing' in the new locators, I know you can still use the 9.3.1 locators to do this; but I heavily suspect that after the 10.1 version we will see this available less and less. The FGDC Addressing Standard places a heavy value on good...

Using JavaScript, my aim is to create an "intelligent" address search function with a single textbox (rather than separate textboxes for house number, street name, street type, suburb, etc). I'm attempting to parse the input string entered by the user, to determine which components of the...

New Book: Geospatial Technologies and Geography Education in a Changing World: Geospatial Practices and Lessons Learned Editors:* Osvaldo Muniz Solari, Ali Demirci, Joop van der Schee This book is an initiative presented by the Commission on Geographical Education of the International...

We recently migrated one of our map services from FGDB to an SQL Server spatial db backend. We are noticing a problem now in that the map appears to display locations inconsistently. I created a JSFiddle to demonstrate the issue and to simplify the code as much as possible...

I want to create 50km buffers around a large set of polylines that have a global extent. My objective is to calculate average raster values within each buffer zone. The matter of confusion: I want to use an equidistant projection to minimize the buffer distortion introduced by the global...

We are celebrating FOSS4G 2015 in Seoul with great open source GIS book discounts at both Packt and Locate Press. So if you don’t have a copy of “Learning QGIS”, “The PyQGIS Programmer’s Guide”, or “Geospatial Power Tools” yet, check out the following sites: In honor of #FOSS4G, all Locate...

Summary: A new interactive mapping tool provides predicted concentrations for 108 pesticides in streams and rivers across the Nation and identifies which streams are most likely to exceed water-quality guidelines for human health or aquatic life Contact Information: Wes...

This opinion piece by James Brayshaw, Vice President of LI and Spectrum Business with Pitney Bowes, takes a look at how location intelligence is helping local governments make timely and accurate decisions. The post How Government Organizations Are Using Location Intelligence to Drive Digital...

I am working on a project that deals with suppressed data. I would like to find any references to or examples of how people have dealt with suppressed data. Of course, it would probably be very similar to how you would deal with missing or no data. Symbolization strategies would be my first...

I'm new to arcobjects (C#) and I'm having trouble finding an example of how to add an image (raster layer) to a MxD. I'm looking to open the MXD, and edit it as a file, without having a workspace open. I have read that the MapDocument can allow for this. In this case, the MxD is not opened...

I have created a map of B&Bs/inns in the US. I am trying to figure out how to send someone a link to the exact location on the map when I zoom in on their blue marker identifying their property. If I click the share button provided by Carto, I am only able to link to the default zoomed out...

I am non-coder but have been playing around with the cartoDB website as it's wizard is pretty simplistic and easy with my data. I have polys setup for each neighbourhood in a city, when I click on a specific polygon I would like the user to be sent to a specific URL in my database (URL...