0
votes
0answers
5 views

How I get all the latitude, longitude coordinates/points inside a rectangular polygon drawn in google maps?

i have requirements: draw circle,polygon or rectangle 2.get all points (lat/long) within this please help
0
votes
0answers
3 views

R-ggmap: Create circle symbol where radius represents distance(miles or Km)

I am trying to add a circle around a given latitude and longitude point where the circle size (radius) reflects distance in miles or km. I managed to come up with this example using ggmap, where i ...
0
votes
0answers
7 views

Specify a GDB feature class using Python Tkinter dialogue box

I tried to specify a feature class from a GDB dataset through Python Tkinter tkFileDialog.askopenfilename. Below is the script. It worked for me in the past when I was dealing with .txt or .las files. ...
0
votes
0answers
7 views

ArcGIS dynamic layers performance with many features to display

So we have data with over 10,000 features in a very small area of less than 50 acres or so and we are getting pretty slow performance of several seconds when the extent is changed via panning and zoom ...
0
votes
0answers
8 views

Creating equidistant grid for transportation project, how do I do it?

Greeting everyone! So, I am working on my final thesis, I've come across this problem. I am newbie at GIS, however, I need to create this grid with equidistant boxes such that these can show ...
0
votes
0answers
11 views

QGIS Topology Checker select errors

I have used the Topology Checker plugin in QGIS to create rules to identify errors in my layer. For example, I have used it to search for all overlapping polygons. This plugin is great for finding ...
0
votes
0answers
8 views

QGIS 2.4.0-Chugiak: How to threshold NDVI to calculate emissivity for land surface temperature

I am analysing urban heat island using thermal band 6 of landsat TM-5 sensor with respect to Normalized difference vegetation index that derived from the Band 3(Red) and Band 4(NIR). Lansat TM 1992, ...
0
votes
0answers
4 views

Plotting together Basemap and barbs

I am using the foollowing script for plotting some data into a map using basemap. from mpl_toolkits.basemap import Basemap import matplotlib.pyplot as plt import numpy as np fc = ...
1
vote
0answers
5 views

CartoDB Add a line from one long/lat point to another long/lat point

I have imported an excel s/sheet into CartoDB. I have the following columns: BookingReference | Long | Lat I want to see the journey my app users take. As such I want add a line between long lat ...
1
vote
1answer
5 views

How do you get the nodes of an area in Overpass API in the “right” order?

I use the Overpass API to get the boundary of an OSM relation. I then use the result to display the boundary on a leaflet map. My problem is however, that the nodes are not in the "right order". ...
0
votes
0answers
3 views

bug in i.rgb.his

I found that the implementation of i.rgb.ihs in porcessing toolbox needs to be corrected. It is necessary to have admin permissions to correct the file i.rgb.his.txt locate in ...
0
votes
0answers
6 views

How to show on a a map of countries only the countries with names contained in a php array

I'm doing an important homework for university and I want to use cartoDB to do some parts of it. On my joomla website I have created a form with Chronoforms and in Chronoforms in a custom code box I ...
1
vote
1answer
3 views

Why my map just grayscale mode after use MRT?

i just follow the step to change .hdf file to geotiff file from this site http://duncanjg.wordpress.com/2012/12/11/loading-modis-ndvi-time-series-into-postgis-raster/#comment-1214 and i use data from ...
1
vote
0answers
9 views

Asset point IDs, pipeline and flow direction

I have a data set of a sewage pipe network and point data (assets). I would like to: first calculate the flow direction of pipes (polyline feature) assign IDs to the pipelines using asset IDs ...
1
vote
0answers
16 views

Spatial search performance on a collection of Points in a PostGis database

Let's assume you have a huge PostGis (using Postgresql 9.2, postgis 1.5) table : BIGTABLE ( p Geometry, someData varchar ) which contains more than 10 millions of records. Each record has been ...
0
votes
1answer
8 views

missing LayerSwitcher in openlayers3

I was wondering if there is a LayerSwitcher control in OpenLayers 3? I read that ol3 is a complete rewrite. But I can't seem to find the equivalent of LayerSwitcher from ...
0
votes
0answers
9 views

Error Applying Symbology to Shapefiles

I'm trying to apply symbology to my dataset after it is populated to the map display, but I am getting the following error. Have I placed the ApplySymbologyFromLayer code incorrectly? Traceback ...
0
votes
1answer
14 views

Con function loop doesn't calculate for all the fifty rasters in a list

I have been trying this for hours and I know it should be easy but I can't make it work yet. I have a list of 50 rasters that I need to change the NoData to "0" values. I have the right arcpy ...
1
vote
0answers
11 views

Add Layers to Map Display from script with default symbology

I have a script that runs IDW iterations and I'd like for the files to be automatically added to the map display after they are produced and contain the default symbology that ArcMap generates when ...
0
votes
0answers
11 views

ERDAS file not recognized as ERDAS Hierarchal File Architecture (EFHA)?

I am trying to do an accuracy assessment in Erdas using "user defined ground control points" (I collected the GPS points myselfin the field using a handheld GPS). However, when I load the thematic ...
1
vote
2answers
5 views

Tilemill didn't render streets correctly, some parts are missing

can someone please explain me what's happend in the picture below or how i can debug what's going wrong? I downloaded some .osm.pbf files imported the files via osm2pgsql into a postgis database and ...
0
votes
0answers
15 views

Writing shapefile with projection defined crashes Fiona part two

I have the same problem as this post. Writing shapefile with projection defined crashes fiona It says that was an issue with GDAL. I cleaned my site-packages of anything GDAL, fiona, six related. ...
0
votes
1answer
8 views

How can I render my own tiles using data I get with cartodb's core API library?

I am trying to use the cartodb.core.js library to render my own tiles. According to what I see, the Tiles library is only available in the cartodb.core.js. And if we use that we don't get the ...
0
votes
0answers
10 views

Problems with layer-selector code on joomla article

I have three visualizations I have created,you can see them separately on the following links http://www.locattivitaecon.altervista.org/index.php/mineral-deposits-map ...
1
vote
0answers
10 views

Enable/Disable Parameters based on Boolean

I'm working in model builder and I have a boolean parameter that determines which of two processes run. Right now, all of the parameters for both processes show up when I run the model. Is there a ...
0
votes
1answer
24 views

Convert python from arcpy.da.SearchCursor to work in 10.0

I am using code such as for row in arcpy.da.SearchCursor(polyFC, ["SHAPE@"], spatial_reference=SR): # create inner buffer polyBuff = row[0].buffer(buffNum * -1) # create hull rectangle to ...
1
vote
0answers
11 views

Get pixel values ascii 50 files

I´m working with photos from a cam. The cam is arranged to take ndvi values instead of RGB for each pixel. I have several folders with 50 pictures in each folder as '*.asc' files the pictures. I am ...
1
vote
1answer
29 views

Iterating an ArcGIS tool over multiple Fields with selection boxes

I have one shapefile that contains many fields and I'd like to write a simple script tool that allows me to run IDW for the fields I select. Is this possible? For example..... Input: 1 shapefile ...
1
vote
0answers
14 views

How to use Attribute Assistant in Canadian Municipal Data Model

Currently trying to use the attribute assistant that you download as part of the CMDM. I have the tables in my new geodatabase, but when I try to edit them I get an error about the Global ID, which ...
1
vote
2answers
24 views

What kind of coordinate uses this WMS? Also how to convert to lat/lon

On this map http://infomapa.rosario.gov.ar/emapa/mapa.htm which I believe is MapServer, I get some coordinates after inspecting with Chrome like this: "geoJson" : ...
2
votes
1answer
30 views

Does ArcGIS Pro join to excel worksheets like ArcMap does?

I love the idea of ArcGIS Pro, especially for non-GIS analysts to get one-off maps done easily and quickly. The big question is: Does ArcGIS Pro join to excel worksheets like ArcMap does?
2
votes
2answers
35 views

Finding a point inside a polygon based on maximum value of a specific field

I have a Polygon Shapefile that represents US counties and a Point Shapefile that represents hospitals. The hospital attributes table includes fields like "Number of Beds", "Number of Patients" and ...
1
vote
0answers
34 views

How to Make an Outside Buffer in QGIS?

I have a layer of street segments that are within a given distance of a fire station. Now I want to make a border around these street segments. If I use Buffer, it puts a buffer around each segment. ...
1
vote
2answers
87 views

Field Calcuator to add percent using Python

What might I go wrong here is that I am trying to add percent. I use the Field Calcualtor and it keeps getting an error. I am opening the Table to add a field named Percent and then type this: ...
1
vote
0answers
9 views

Animation in CartoDB

How do I prevent my animated in CartoDB map from starting over (looping)? I would like it to animate and end on the latest date.
2
votes
1answer
20 views

Manual (or examples) of r.ros, r.spreadpath and r.spread in GRASS

you can report me references or applications for use of the following modules (GRASS): - r.ros, - r.spreadpath, - r.spread. Thanks so much.
1
vote
0answers
28 views

Discover multipart features in a layer in QGIS

I am trying to identify multipart features using QGIS version is 1.8.0. I've tried: look at the attributes table select a random feature and check in the canvas if there are multiple geometries ...
0
votes
0answers
11 views

Restart plugin from PyQGIS

I'm writing a plugin for QGIS and inside the method def run(self), after the OK button of the plugin is clicked, i.e., inside # Run the dialog event loop result = self.dlg.exec_() # See if OK was ...
3
votes
1answer
20 views

Curvature computation for different scales

I would like to assess terrain curvature, i.e. the 2nd derivative of a DEM, on different scales. The most common approach to curvature seems to be the one suggested by Zevenberg (1987) where a ...
1
vote
0answers
6 views

Photogrametry using e-Foto (Stereo Plotter, Stereo Imagery)

I'm learning Photogrametry with Stereo-view using e-Foto (http://www.efoto.eng.uerj.br/en). At the end, I want to know how to do Photogrametry via Stereogrametry. I could replicate successfully ...
1
vote
1answer
18 views

IdentifyTask for “hollow” polygon (using ArcGIS API for JavaScript)

I have a web map application set up that's currently testing on a variety of Dynamic Map Service layer types, including points, lines, and polygons. This application includes a tool that makes use of ...
1
vote
0answers
14 views

customize the silverlight esri feature data grid form template?

I would like to add drop down box and multi-column text box to the feature data form which pops up when i click on the feature data grid. Instead of the regular text box i would like to replace some ...
0
votes
0answers
6 views

OpenLayers: showing polygon within donut hole

I Am using OpenLayers 2.13.1 to display Zip-areas. I have a postGIS database with multi-polygons, that I show on a map. The user can select / deselected them. Some polygons have an area (I think they ...
0
votes
2answers
29 views

Export selected fields in ArcGIS to Excel using Python

I'm am creating a script that will allow a user to add XY coordinates to a point layer, then export (along with any addition user selected fields) to Excel. I am getting stuck on the iteration of the ...
0
votes
1answer
8 views

OpenLayers: programmatically fire ModifyFeature event

Does anyone know how to programmatically simulate a vector feature click that puts this feature from normal mode: to modifyfeature mode: I only have one feature inside the vectors layers and i ...
1
vote
0answers
12 views

QGIS 2.4.0 doesn't support multiple types of geometry in GML file

I'm testing GML 3.2.1 data according to INSPIRE Data specification (version 3.0). Data for theme Cadastral Parcels shall have both polygon geometry and definition point. When I download data from my ...
1
vote
2answers
27 views

Edit multiple vertices of different features simultaneously

I am using ArcGIS 10.2.2 and would like to edit multiple vertices of different features simultaneously. For example, I have a man hole with three laterals - is it possible to select all four features ...
0
votes
0answers
19 views

RMSE value in rectification [on hold]

Landsat satellite image having 3 RMSE would be conSider better than RMSE value 2 for IKONOS satellite image rectification ? means which one is better rectified with these RMSE value IKONOS or ...
1
vote
2answers
36 views

How to use an IF THEN statement in an sql Select expression?

I need to select the top 3 records from a table, but depending on an inline variable from an iteration, occasionally one of those top 3 records should not be selected and should be replaced by the top ...
1
vote
1answer
32 views

QGIS - Identify overlapping polygons in single layer

I have a shapefile of buffered points in QGIS. I need to display all buffer polygons in this layer which overlap. I have experimented with the intersect tool, but this only seems to work if I am ...

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