All Questions

2
votes
2answers
46 views

Georeferencing PDF maps for use in Avenza PDF maps

I have PDF maps like the one below (normally PDF, but JPEG for this) that I would like to be able to georeference to use with PDF maps. I don't have GIS training, but have access to Arcmap 10.1 and ...
0
votes
0answers
12 views

Google Maps API GTileLayerOverlay with MapServer not work

I have a WMS server (using MapServer and Apache on windows). i read this document about Mapserver's Tile Mode and use that's example to overlay my map on Google maps.but not work. my code: function ...
11
votes
2answers
979 views

Drawing Day and Night on a Google Map

I'm looking to plot day/night on a Google map, for an arbitrary point in time. I'm familiar with generating map tiles; I'm just looking for an algorithm to tell me whether a particular point on the ...
3
votes
2answers
1k views

How to set proportional value in legend?

I have a GIS table with traffic flows.The thickness is proportional to the traffic value and I'd like to have a little legend with 3 links proportional to setted value (eg: link1 proportional to 100 ...
2
votes
0answers
13 views

QGIS : cannot change the z-coordinate of a point shapefile using the wkb geometry format

I am using QGIS Desktop 2.5.0-Master with GDAL/OGR 1.11.0 on a windows 7. I am working on a little pyQGis script that should modify the z-coordinate of points in a vector shapefile based on a value ...
3
votes
0answers
19 views

Generate a series of ellipses on a line

I am trying to create a series of ellipses (mocked up in green below) of defined dimensions along a line. I have got as far as generating regularly spaced points along the line that are attributed ...
1
vote
1answer
5k views

Uncaught SyntaxError: Unexpected token : when using ajax

I try to call json data from geoserver, but when i try to run it in chrome, it return this following error "Uncaught SyntaxError: Unexpected token :" This is my code, function ...
1
vote
1answer
16 views

Direction of movement with points2paths in QGIS

I have a data set containing ship movements. I used the Points2paths plugin in QGIS to connect the points with the ship's names as factor and the time the signal was picked up as sorting value. Now I ...
3
votes
1answer
48 views

Fast raster combine using rasterio

I'm trying to duplicate the functionality of ArcGIS's Combine function within rasterio. Given a list of (presumably categorical) rasters read with rasterio, I want to output a combined raster and a ...
1
vote
2answers
272 views

Creating flat end type polylineline buffer in model without ArcGIS advanced

I have a polyline split into many short segments and would like to create a flat end buffer for each individual segment (not "dissolve" them all into one feature). Is there any way to do this in an ...
0
votes
1answer
91 views

Cause of ArcGIS Raster Calculator Parsing error <type 'exceptions.SyntaxError'>: invalid syntax?

This is my first attempt at much code in the raster calculator of ArcMap 10.0, but I think I'm close. I have nine rasters (A-I below) and want a new raster with value = 1 where any of the rasters ...
3
votes
1answer
40 views

Spatial join without operation on the variable of interest

I have a simple problem: I've got to spatially join records of an epidemic in forests to some plot coordinates I have gathered. Problem is, I cannot obtain the records for each year on each plot, I ...
2
votes
2answers
52 views

Flow Mapper wrong line length calculation

I'm finding some trouble with the length calculation in the Flow Mapper plugin. As you can see in the picture below the length of the 2 lines C001-C021 = 4233.7986... C001-C009 = 6069.3053... is ...
0
votes
1answer
21 views

how to convert list of stack images to timseries files in R

Iam using bfast package for time series analysis. But it requires the files to be read as timeseries Problem: How to convert list of stacked images from 2000 t0 2013 into a time series and given as ...
1
vote
0answers
13 views

when make a cross-platform c++ GIS core, how to make the 2d-drawing platform independent? [on hold]

i try to develop a c++ no-GUI GIS core(i want the core have no GUI related things, do not use any GUI library) and I can figure out how to do other things except the drawing part. when cope with 2D ...
1
vote
1answer
18 views

Wrong coordinates after Usage of NumPyArrayToRaster(…)

My Project I am currently working at should enable cellvalue manipulation on raster files using ArcPy. My Script works fine except I am not getting the right Y-Values (northing values) for the ...
0
votes
0answers
9 views

Examples of config.yaml for printing

I've been reading this, I wonder if there are config.yaml nice examples available to take a look at them. I'd appreciate if some web links for the examples or output images can be provided for this, ...
3
votes
1answer
45 views

Will core functions in QGIS 2.6 exploit multi-threading?

After reading a recent post about introducing multi-threading to QGIS, I was wondering if QGIS 2.6 will include this when running various processes. I checked online and I could only find that ...
2
votes
1answer
30 views

Horton Stream Ordering in ArcGIS?

Is there a way to order streams using the Horton (opposed to Horton-Strahler) method in ArcGIS (10.2.2)? I know the Stream Order tool allows you to use Strahler and Shreve.
4
votes
1answer
47 views

Equivalent of excel Alt+Enter in attribute table?

On excel, you can do "carriage return", that is, jump a line, using Alt+enter within a cell. When I copy a cell from excel in my attribute table, this format is respected. I can find no way to write ...
0
votes
1answer
87 views

How to avoid snapping errors in QGis?

I am using QGis version 2.2.0 and I set the snapping option to the vertex, with a tolerance of 1.5 meter. When I draw a new polygon next to an old one, it seems like the vertices are automatically ...
1
vote
0answers
13 views

Combine group of maps to add/edit features in .NET

Use Case: I have 100s of square/rectangle shaped maps which I want to edit/add features like Dam, Ponds etc. either one map at a time (or 8 maps on each side & corner, if possible). The task is to ...
1
vote
1answer
32 views

Operations between shape layer and csv layer

I've got a question for you! I have a .shp layer containing point geometry with xy coordinates in the attributes (left) and a .csv layer containing a square Origin/Destination matrix(right): I ...
1
vote
0answers
9 views

Delete a file engaged in a process

I am trying to delete a file which is involved in a process. Using the following line to obtain the file name. Tkinter file_output_name = ...
0
votes
0answers
11 views

Filter MapComposer legend to only show layers visible on the map

I have written a function in Python / PyQGIS (no standalone application, so copy/paste it to the Python console editor to run it) that takes a VectorLayer as argument, creates a MapRenderer object for ...
1
vote
1answer
17 views

PostGIS 2.0 and Self Intersecting Features

I have a polygon feature class created by open streetmap that is returning a self intersection error. Is there a way to filter out these feature? Can I just use a sql statement to find the error ...
1
vote
1answer
27 views

GDAL external overviews not recognized by ArcGIS

I am adding external overviews to a number of TIF files with GDAL as follows: gdaladdo -ro file.tif 2 4 8 16 --config COMPRESS_OVERVIEW LZW Then, when I add the tif file to ArcGis is still asking ...
1
vote
1answer
88 views

fatal error LNK1104 qgis build

I try to build qgis1.8.0 using Microsoft Visual c++ 2010 in a Windows 7 64bit. all the dependency are installed and the solution qgis1.8.0.sln was generated succesfully. but my problem is the ...
6
votes
2answers
617 views

How to get latitude, longitude and altitude database from a GeoTIFF file?

I am developing an AR iOS application. When the iPhone gets the current location, it has to calculate locally the visible point. I want to read the tiff files in my application, and then get the ...
1
vote
1answer
148 views

Raster extent, just clipped by geomtery, slightly differs from a given geometry

The raster using arcgis geoprocessing is cliped with a feature, reading it's geometry and as a result, rasters extent slightly differs. Extent of geom: str(row.shape.extent) '570600,537958652 ...
2
votes
1answer
31 views

How to make zonal statistics model more efficient?

I've made this model, to assess some 500-600 rasters for one area, and spit out one huge table. So far, when testing it with 20-30 rasters as inputs it works, but now that I put in the full amount its ...
0
votes
1answer
12 views

How to hide a layer dynamically from layers groups in Geoserver?

I have created a layer group (using 15 layers) in Geoserver. I can access this layer group through Openlayers & it's working fine. As per the client requirement, I need to develop a layer switcher ...
1
vote
0answers
23 views

Importing kml google earth polygons to QGIS

I've created some polygons in google earth, saved it to kml and then I loaded these files into QGIS. The problem seems to be the projection, these polygons are slightly out of the place. I've tried ...
2
votes
1answer
32 views

Convert line shapefile to raster, value=total length of lines within cell

I have a line shapefile representing a road network. I wish to rasterize this data, with the resulting values in the raster showing the total length of the lines that fall within the raster cell. The ...
4
votes
1answer
321 views

Grouping of layer with GeoServer and OpenLayers

I need help to display layers group/non group 1. with checkbox to select layer or group 2. icon/symbol for each layer. I saw example codes from OpenLayers where it's adding the layers statically. ...
1
vote
0answers
16 views

QGIS Deployment in Citrix XenApp - How to Remove Pyramids from the image “properties”

I'm working on deploying QGIS 2.4 into a XenApp 6.5 desktop environment. We've tested QGIS to see if it will run in our environment on a test server and have found that building Pyramids with Ariel ...
0
votes
2answers
47 views

Converting coordinates to 4326 for Google Maps.

I have a MultiLinestring, example coordinates, (698745.50201423 4210011.04002000) and I would like to convert them to something like (24.362 42.458) to use in Google Maps. When I try to get the SRID ...
0
votes
1answer
12 views

geoserver's geowebcache watermark setting

anyone here has used watermarking in geoserver? I have successfully set watermark to my WMS layer, but in my OpenLayers 3 project, I use 'Tiled': true WMS setting and my GeoWebCache doesn't display ...
1
vote
1answer
39 views

QGIS select reversed geometries

I have a road network and a geometry for each road direction. One Geometry from A->B and another Geometry from B->A. This geometries are covering each other. Is there a tool available in QGIS to ...
0
votes
1answer
26 views

leaflet-omnivore style function

Please pardon my ignorance in advance, but is it possible to style a layer(polygon) using the plugin leaflet-omnivore? All of the examples I've encountered are using the MapBox API I have the layer ...
0
votes
1answer
22 views

Will a tile cache serving PNG tiles be slower than JPEG?

I'm trying to figure out the best format to serve my tiles. I'm creating an ESRI tile cache. It will be consumed internally through ArcMap from our server, not online. There are a lot of different ...
1
vote
0answers
26 views

Braun/Gall projection and pixel conversion

I am fairly new to projection mathematics and I usually manage to get things to work with copy-paste and trial-and-error but this time I'm lost ... I am trying to map latitude (-90 to 90) and ...
0
votes
1answer
45 views

Mapserver: “Premature end of script headers: mapserv,”

Some of requests to the Mapserver return "Internal server error". When I checked the Apache log I saw that there are several error messages: GDAL: In GDALDestroy - unloading GDAL shared library., ...
3
votes
1answer
50 views

Transforming coordinates from one projection to another

var bounds = config.init_center.transform( new OpenLayers.Projection("EPSG:31466"), new OpenLayers.Projection("EPSG:3857")); console.log(config.init_center); console.log(bounds); I have ...
0
votes
1answer
113 views

WMS render geotiff as a small image

Hye! I am facing Strange problem,My Geoserver 2.2.4 was stop working suddenly so i made a backup of Dir folder and install Geoserver 2.3.5 and replaced workspace folder with new one. Now all ...
1
vote
0answers
19 views

Issues with QGIS WFS editing/PostGIS rendering

I want to be able to view and edit spatial data within a postgis database. I have tried using a WFS with Geoserver - but constantly get 'Empty Response' error and the Network log says the request ...
1
vote
1answer
14 views

Hiding specific icons/markers on text generated vector layer

I'm displaying a vector layer with pois, generated from a text file: lat lon icon iconSize iconOffset title description 56.030325 14.4774116666667 ...
0
votes
0answers
31 views

CORS activation in Geoserver

I am running geoserver-2.6.0 directly from the terminal (no Tomcat etc). In my openlayers code, I am generating a url which should be called by jQuery getJSON function to extract the containing JSON ...
2
votes
0answers
25 views

how to display the legend when the map contains external icons in R

I haven't found anything about the legend when the map contains icons external R (in png), is't possible to use the legend function or another function in R.
0
votes
0answers
20 views

arcgis flex widget close a window and open another window with datagrid

I uses Arcgis api for flex 3.6 and adobe flash builder 4.6. I want to develop a widget use a window (say window 1) to allow user to input searching criteria, after click "Ok", window 1 should close ...

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