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Mapping for Change, the social enterprise that I co-founded, has been assisting community groups to run*air quality studies for the past 5 years. During this period we have worked in 30 communities across London, carrying out studies with different tools – from collecting leaves, to examining...

Bonjour à tous, J'ai voulu imprimer des pdf qui sont très bien sortis... Cependant j'ai un soucis. Je ne peux pas supprimer les dossier et bloque mes autres collègues d'imprimer. J'ai bien essayer net stop spool et net start mais rien y fait j'ai toujours ces documents avec marqué supression...

For those who are unaware. Free and Open Source 4 GIS North America (FOSS4G NA 2016) will be happening in Raleigh, NC May 2-5th 2016. We are accepting proprosals now. Early Bird proposal deadline is January 22nd, 2016. Which means if you submit early, you'll get a notification early before...

I am doing a cadastral application as a plugin and I want to export some table in data [in a model] with the parcels displayed [ the geometry ] to pdf file. And I am thinking to do that using a QGIS print composer.But while creating layout I was able to add loaded canvas I was able to add...

Has anyone has sample outputting maps into a Layered and Georeferenced PDF using c++ and GDAL? أكثر...

If you’re interested in making maps and know nothing about them, this would be a good place to start. What does it mean to make a map, and what is GIS? أكثر...

I am developing an application using ArcGIS .net add-in. An application generates some maps based on point and polygon datasets. In that, I am able to find the polygons within the search distance. Now, wanted to create a nearest point on these polygons. I am using ReturnNearestPoint() function...

I am working on GIS application. I am trying to find whether a point is located within a polygon or not. I have written a piece of code for this using Relational operator but the Contains() method of it always returns false. Can you please Help? Private Function...

We have a GeoJSON file that contains an array of features each with their associated geometry. How can I calculate the area of each feature? Are there any Java or Swift libraries to help me? Any advice on how to get started here? Please excuse the naive nature of this question. I'm new to...

I have few vector layers which I need to edit frequently. I'd like to be able to see through the layer when it's selected. I changed selection colour from both: Project Properties General settings and Options-->Canvas&Legend settings. For both of these I changed the opacity to 40% --> click OK...

I have two data sets and want to compare/evaluate their degree of spatial association expressed in terms of the LISA statistic. The local Moran's I statistic gives for each point a (pseudo) p-Value and a correlation coefficient. I want to make a statement like "The points of data set a are...

I've found a couple of other Stack Exchange questions related to this, but they were not satisfying. For example: How does ArcGIS Desktop calculate INSIDE point for Feature to Point? does not tell me how the "Inside" point is determined. While the ArcObjects may refer to centroids and label...

I am testing my work for the generation of GTFS data for London city from APIs provided here. I have my App Id and App Key with me. As I provide the Id or other required fields, an API is generated which is having the information. I use this API in Safe's FME software (using HTTP caller) and...

Hey guys i was just playing around with openlayers 3, and i created THIS fiddle, take a look at the javascript initilization code below: var styles = [ 'Road', 'Aerial', 'AerialWithLabels', 'collinsBart', 'ordnanceSurvey']; var layers = []; var i, ii; for (i = 0, ii =...

The new Mapbox Studio seems to have a button for downloading a style: but not a dataset: So, is there actually a way to export a whole dataset? This may seem like a strange thing to do, but since the editor is now cloud-based, you don't necessarily have the source files close at...

I've been using "add polygon attributes to points" in qgis for a while, but hadn't needed it for a while (thanks to Underdark for this); in 2.13.0 master on ubuntu it seems to be missing from the processing toolbox. Am I missing something? Do I need to install something special? Thanks in...

This question is an exact duplicate of: Does anyone know a public open large GPS datasets with labeled visited places that we can use in research projects? [on hold] We are working on the problem of outdoor activity recognition, for this...

We are looking at sites and trying to determine what level of accumulation to extract by in order to create watersheds. Is there a standard? We cut out buffers (radius of 5000m) around each site. أكثر...

I've recently began trying out basic geoprocessing tools by using arcpy (clipping layers, buffering, etc). However, this seems slower than using the Arcmap GUI. Are there any advantages to using Arcpy for simple tasks that can otherwise be done directly through the GUI? Thank you...

I have a table of boundaries(polygons) which need to be served up through ArcGIS Server with their centroids(points). I'm using Oracle spatial and thought the most efficient way of doing this was to create a spatial view where the SDO_CENTROID function was used on the geometry. The table...