5
votes
2answers
90 views

Adding new record with specific coordinates into shapefile using ArcGIS for Desktop?

I need to create a new point record in my shapefile. When I use the Create Features tool in the Editor tool, I can click anywhere on my map to create a point, but when I go into the attribute table to ...
3
votes
2answers
107 views

How to map tabular data based on city/province name?

I am very new to GIS and ArcGIS so would appreciate any advice/help. I have an Excel file containing data on cities (only names) and provinces (of those cities) for 158 countries around the world. ...
1
vote
1answer
44 views

Update QGIS on Mac OS X

I would like to update QGIS from 2.2 to 2.4 on Mac OS X (10.8) but I cannot find how to do so. Do I have to uninstall and re-install all from KyngChaos? If so, I would therefore lose the extensions ...
1
vote
1answer
24 views

Online WKT and GeoJSON viewer

I once found a great but simple webpage that has a drop down with several text-based GIS formats such as GeoJSON and WKT, and a text box to copy/paste your data. The feature is then drawn on a world ...
1
vote
0answers
31 views

midpoint of segments in QGIS determination

Gene thanks for your note on the problem yesterday ... This is a follow up to a question I posed before (How to find the middle point of a line in QGIS - Where to place input file name). Errors coming ...
2
votes
0answers
21 views

Correct syntax for retrieving features from GML format in OpenLayers

Yesterday I made with qgis the shapefiles of my town and now I wanted to add them in a web application I'm making with OpenLayers. The problem is that, while it loads them perfectly with the wms ...
2
votes
1answer
20 views

How to calculate which zip code is closer to which in USA using C#?

I'm not living in USA, and I'm doing a small project for a company based in USA. The point is that, there are businesses and each of them have their address and zip code. Then, I have a form where ...
1
vote
0answers
17 views

Buffering/extrusion of a dem surface

I have a surface representing a DEM and i would like to add it some thickness. If i simply duplicate the surface and translate it down by my thickness, i get non uniform thickness, ie thinner where ...
1
vote
0answers
16 views

PointStacker - Random locations at different zoom level

I'm applying PointStacker transformation on one of my layers using Geoserver 2.5.2 and OpenLayers 2. I know, that I have 7 datapoints located on the exact same location. However, when I change the ...
3
votes
1answer
57 views

Ripley's K function in QGIS Chugiak 2.4

I'm a noob user and I need to apply the Ripley's K-function on a point pattern in QGIS 2.4 Chugiak, but I don't know how to do. I think I need to use some plugin or extension (maybe GRASS, R or ...
1
vote
0answers
21 views

Coloring polygon based on date using TileMill/CartoDB?

How would you color a polygon/line/dot based on a date? The colors would be a pre-set list. I need the area to update its color based on the current (or given) date. I would be using tilemill or ...
0
votes
0answers
27 views

Calculating area of larger polygon containing smaller polygon of same feature class inside it using ArcGIS for Desktop?

I am preparing soil of a given area. I have finished all and corrected topologically. But there is soil type inside another soil type surrounding it. How can I correct this task?
0
votes
1answer
16 views

How to run tilemill remotely via the web interface (ubuntu)

I have set up tilemill on my Ubuntu 12.04 machine using the commands: sudo apt-add-repository ppa:developmentseed/mapbox sudo apt-get update sudo apt-get install tilemill service tilemill start Now ...
2
votes
1answer
26 views

Extract longitude latitude and radius from POSTGIS column

I have entered the circle in the Geometry type column (name=shape) in my POSTGIS as following: ST_Buffer(ST_MakePoint($longitude, $latitude)::geography, $radius)::geometry Then I extracted the ...
4
votes
2answers
64 views

How to filter LiDAR data by scan angle?

I am looking to filter LiDAR data (.las format) by scan angle specifications (e.g. keep all points < 15). From a basic Google search, it appears that the LibLAS library has the ability to filter by ...
1
vote
1answer
5 views

Generate Statistics from check-out GDB While performing Check-in

I have created Check-out Replica from the main ArcSDE GDB. I have below questions. How to generate statistics of the edits performed on the check-out GDB, before check-in. for example: i want to have ...
1
vote
1answer
28 views

Reclassification of raster surface using ArcGIS for Desktop?

I have a raster surface with values ranging from 0 -100. I want to create a categorical classification (percentage categories of 5%, e.g. 0-5%, 6-10%...) and reclassify my surface into these ...
7
votes
1answer
173 views

Can PostGIS and QGIS provide dependable multi-user editing?

After considering a few options, I'm trying to give my 15-20 QGIS 2.2 users the ability to concurrently view/edit one or two basic point PostGIS layers, largest one has just 16,000 records. I've ...
2
votes
0answers
28 views

QGIS There isn't entry in geometry_columns!

In PostgreSQL v9.3 with PostGIS v2.1 extensions I created a view from two tables (sites & visits). The site table contained a point geometry column (the_geom), which was included in the created ...
2
votes
1answer
41 views

Calculating NDVI using Landsat ETM+ band values

I have sample points (shape file converted from a .xls file which contains XY coordinates,nnx,nny and canopy density) and a landsat etm+ image. First I applied 'SpatialAnalyst Tools>Extraction ...
2
votes
0answers
42 views

QGIS atlas generation to make company expansion slideshow/video

I need to create ~98 maps each showing the locations of customers as a company expands over a time series. These will be made into a slideshow/video showcase so all maps need to have the exact same ...
1
vote
1answer
46 views

problem in pgRouting with data from google earth

Hello i am new in forum an in Postgesql,postgis and pgRouting. I try to make a pgrouting for my city roads. I use googlemaps to make a lines with coordinates of the roads and export the results in ...
1
vote
0answers
38 views

Is there a python function in QGIS to detect if the output file is saved to the hard disk?

I'm currently using QGIS 2.4 and writing some custom scripts on it. A proper script not only accomplishes its function, but also accepts user defined parameters and checks for possibilities of errors. ...
1
vote
0answers
17 views

Wrong Display in Line Symbol and Gradient Color

I create a line symbol with specific gradient color and below control template: <ControlTemplate> <Path x:Name='Element' StrokeThickness='10' UseLayoutRounding='False' ...
2
votes
1answer
40 views

QGIS crashing when using 'save as' to save a new projection

Every time I try to save a layer with a new projection using 'save as' my QGIS crashes. The new files are there but they seem false. Please see two screenshots attached, one before and one after I ...
2
votes
1answer
30 views

QGIS atlas-generation: Is it possible to preserve the map section?

My aim is to generate several maps with the atlas function in QGIS 2.4 (win7 64) showing the same map section and scale. However, each generated atlas map shows a slightly different map section (not ...
0
votes
0answers
22 views

Find correct SRID

I'm learning PostGIS raster, and importing GeoTiff with raster2pgsql. This command line tool states: -s <srid> Set the raster's SRID. Defaults to 0. If SRID not provided or is 0, ...
2
votes
2answers
42 views

csv to shp missing file

I transform a csv file into a shape file using the following script import shapefile as shp import csv import tkinter.filedialog import urllib.request import os a = ...
1
vote
2answers
50 views

Standard deviation classification in QGIS

Is it possible to implement Standard deviation classification in QGIS symbology of a layer like in ArcGIS: http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=Standard_deviation I need to ...
3
votes
1answer
47 views

OSMOSIS: How to extract all railway stations in use?

I'm trying to retrieve a list of all railway stations of Belgium that are in use. I downloaded the country osm from http://download.geofabrik.de/europe/belgium-latest.osm.pbf. I tried the following ...
1
vote
0answers
23 views

Joined field not recognized as number in QGIS 2.4 [duplicate]

I have a weird problem. I've loaded in QGIS a point shapefile and a CSV table. Then I performed a join between the 2 layers and all works fine. But then the joined columns (made of integers or real ...
3
votes
1answer
27 views

How to automate exporting map for many fields in the same layer?

I need to make a few ~75 frame time-lapse animations where each frame is a map of site status in a given week. Each week's statuses are a different field in a single shapefile. I export a frame of ...
3
votes
1answer
80 views

OpenLayer plugin in QGIS 2.4 not working

OpenLayer plugin in QGIS 2.4 is not working properly when not loaded in first place. If I add an OSM map with the plugin immediately when opening QGIS, all goes well. But when I call the plugin ...
3
votes
2answers
67 views

Convert Lat/Lon Pair to Cartesian

I'm lost on how to correctly and accurately translate Lat/Lon coordinates to XY coordinates to draw them using OpenGL. The coordinate information I have is the following: Start Lon, Start Lat, End ...
2
votes
0answers
25 views

How to find the middle point of a line in QGIS - Where to place input file name

I am trying to follow the python code below (How to find the middle point of a line in QGIS) to create midpoints of line segments in QGIS 1.8. I am receiving errors executing the code. Unfortunately, ...
2
votes
1answer
29 views

How do I convert OSM XML to rendered tiles for offline use?

I'm new to OpenStreetMap and I'm trying to figure out how to process an OSM XML file and create map tiles for offline use. I already have the OSM XML file downloaded; I just don't know what to do ...
1
vote
1answer
18 views

How to get Network Analyst to find nearest facility on globe?

Currently, the nearest facility matrix results stay within the confines of the GCS84 projection, so the route from Los Angles to Japan travels EAST not WEST. How can I change the settings to permit it ...
2
votes
1answer
33 views

Exporting layout elements and constants to Python script?

Is it possible to export the elements and constants used in a layout to a Python script? Something similar to creating a model and exporting it to Python but instead of being a model, it's a layout? ...
0
votes
0answers
24 views

mxd.saveACopy(outMxd) not working

Getting an intermittent error. I'm opening an MXD, modifying, and then trying to save out with a new name. I think it's because the output MXD name is similar to the input MXD name. Note that I ...
1
vote
0answers
8 views

Can I create rasters from points with values based on a related table?

I have weed mapping (points) and weed monitoring (tabular related table) data in a file geodatabase. I would like to convert the points to raster based on the weed cover values in the weed monitoring ...
2
votes
2answers
37 views

Python Tool Not Opening

I know that this is definitely an ambiguous question. However, I initially had my Python toolbox working great. I then wanted to have additional functionality with it and added some more coding. ...
1
vote
0answers
18 views

Arc error executing function Skyline with surface

Trying to get a skyline for a set of 3D points based on a DEM (LiDAR based raster), but get the catch all error 999999. The surface is optional and the function works when no surface is assigned. All ...
0
votes
0answers
31 views

Facing difficulty in saving an output to CSV [on hold]

After implementing the code published by Jason in this answer to How to list feature classes in multiple geodatabases in a folder?, I have received an output like this: ...
1
vote
0answers
26 views

leaflet layer control checkbox options min/max

I have a straight forward leaflet map that is on a webpage. I am using the angular-leaflet-directive and all works as expected except for the layer control box. When only one baselayer is specified I ...
3
votes
2answers
42 views

Automate Splitting Polygons Into Sections

I've searched for similar problems on this topic but can't find a solution. I need to split many, many, many cemetery sections into 8 (mostly) equal pieces each. Each section is for the most part ...
2
votes
3answers
47 views

How to create Map from jpeg in Arcgis 10

I'm pretty new to Arcgis software and going to create map. I have some points which should be shown on the map( there are temperatures of cites). So, I need to create a map in arcgis. I guess! What I ...
1
vote
0answers
14 views

geoprocessing service via python toolbox script, local versus server paths

So I feel like I'm missing a very basic concept when it comes to publishing python toolbox scripts to a geoprocessing server. I've scoured the ArcGIS online help (not saying I've read everything, and ...
1
vote
1answer
35 views

Looking for information on methods or algorithms used to calculate centroid from polygons across software

Looking for information on methods or algorithms used to calculate point centroids from polygons across software. ArcGIS uses a "gravity model" but can someone point me to the math or a paper on the ...
2
votes
0answers
36 views

Point sampling along a pole-wrapping coastline with PostGIS

I am working on a task that requires me to get sample points every 1000KM along coastlines, and have run into a problem with Antarctica. From what I can tell, it seems to be an issue with the use of ...
2
votes
1answer
46 views

Adding new Field and writing values for all features

I need to create new Field in Attribute table of vector layer, and afterwards to calculate values and store them in that Field for all features I have in that layer. I have solution which works, but ...

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