0
votes
0answers
1 views

Plot shapefile with matplotlib

I am trying to read a shapefile and plot it using matplotlib. Here is the code: import matplotlib.pyplot as plt import shapefile shpFilePath = "D:\test.shp" listx=[] listy=[] test = ...
0
votes
0answers
6 views

Learning Arcpy Network Analyst arcpy.na

Can anyone recommend online resources for learning to use the arcpy.na Network Analyst extension. I'm particularly interested in automating network solves with input parameters, but would also like to ...
0
votes
1answer
3 views

unit of point radius in OpenLayers.js

What is the unit of measurement for pointRadius in the code bellow? var dotStyle = new OpenLayers.StyleMap({ pointRadius: 5, }); I mean what does 5 represent? 5pixels or 5mm? or ...
0
votes
0answers
2 views

Difference between FCELL, DCELL and CELL in GRASS GIS?

Can anyone clarify for me please the options in the "precision" parameter when calculating slope, aspect and curvature in GRASS GIS. What is the difference between FCELL, DCELL and CELL?
0
votes
0answers
8 views

Connect two contour line with calculated line lenght

Is it possible to make plugin for qgis like PEGGER for arcview 3.2? Problem is, how to make path over contour lines with a grade in percent Formula is: K= e*100/G*M ; K=10*100/0.08*10000=1.25m K- ...
0
votes
1answer
11 views

Error using arcpy.da.SearchCursor and MakeFeatureLayer

im trying to write a script that allows me to iterate through my map layers, and for each layer, iterate over each feature and add a field that gives the location of the feature using my index layer ...
0
votes
0answers
17 views

Calculating vector area in QGIS

I have calculated a viewshed (ZVI) in OpenWind and opened the raster in QGIS I have then converted the raster to a vector When I open the attribute table there are 4681 rows and there is a column ...
0
votes
0answers
10 views

Choosing time frame for change detection analysis?

May i know if there is any standard time scale on which change of land use/cover should be analysed? I have a difficulty choosing the time frame for my analysis. I mean how far apart do the years ...
0
votes
1answer
28 views

Add field to feature class by location

im trying to write a script that allows me to iterate through my map layers, and for each layer, iterate over each feature and add a field that gives the location of the feature using my index layer ...
1
vote
1answer
9 views

Rasters change pixel size and range of values when imported into QGIS

I have observed that when I import rasters into QGIS their pixel size changes and also, the full range of the raster's value does not appear. For instance, I may have a raster with values ranging from ...
0
votes
1answer
9 views

Merge shapefiles in folders and subfolders with arcpy

I try to merge 20 shapefiles in order to get one shapefile that include all the features. All shapefiles are called "migrashim", and they spread in big folder that divided to a lot of sub folders. ...
0
votes
0answers
11 views

MapInfo Calculating the number of Points that Fall within a Boundary

I have two layers in MapInfo (points and polygons). I need to select points which fall within polygons where the income > 1500 I tryed this one but not working: ...
0
votes
0answers
5 views

Google Maps API v2 and Maps engine

I´m researching on the options in drawing shapes on Google Maps with API v2 and Google Maps Engine. I´ve managed to set up the admission to draw a viewed layer on my setup on my site. Does anyone know ...
0
votes
0answers
11 views

Exporting spatial object in mysql to shapefile with spatial reference

Info: Win7, MySQL 5.x and OSGEO4W 1.11 To import a shapeafile to MySQL I use this ogr2ogr command: ogr2ogr -f MySQL MySQL:gis,user=root,password=password C:\posto_pianco.shp -nln pianco_post -a_srs ...
0
votes
0answers
10 views

Geoserver (automatic labeling generalization)

Im Master student looking to do my thesis in cartographic labeling using the geoserver (my thesis is gonna be something like cartographic labeling in real time mapping using web services) and in that ...
1
vote
1answer
14 views

Problem in importing shapefile to Postgis with postgis Shapefile manager

i have a problem with importing my shapefile to postgreSQL, it's a poroblem with the encoding, here's the screenshot: i tried to change encodingin "options" buti get this message: "Failed in ...
0
votes
0answers
14 views

Edit attribute table for several layer files?

I try to edit attribute table for 20 layers that spread in big folder that divided to a lot of sub folders. In How to edit attribute tables using Python/ArcPy? the script used only for one layer at ...
0
votes
1answer
29 views

How to create a text file containing layer names in QGIS?

My QGIS ToC contains layer groups and some layers that do not belong to any group. I would like to create a text file containing the name of those layers that do not belong to any group. Is there an ...
0
votes
0answers
11 views

arcmap display full date

I am working with arcmap software. I have a points layer that was created from a gps device. this layer contains a few tracks from the same day (e.g driving to work in the morning, returning home, ...
0
votes
0answers
6 views

mapserver python mapscript WFS RAW POST data

I installed mapserver-6.2.2 and python mapscript in a Openshift gear (Red Hat cloud). But I can't work with WFS RAW POST data. This is my configure line ./configure --prefix=$OPENSHIFT_DATA_DIR ...
0
votes
1answer
14 views

ArcMap keeps crashing whilst using simple C# .NET addin

I honestly have no clue what is causing this. I want to have a message appear that tells me which layers are selected or not. Here is my code: using System; using System.Collections.Generic; using ...
1
vote
0answers
6 views

losing resolution when using FME Webmaptiler

I'm new to using FME and could use some help. I'm trying to take a Geotif image and tile it up into pngs using webmaptiler. The issue I'm having is that the png tiles look pretty poor in ...
0
votes
3answers
35 views

How to calculate the center and radius of a circle based on points

I have a set of lat/long points. I need to calculate the center point and radius of a circle that will encompass all the points. The co-ordinate system used is latitude/longitude as per google maps. ...
2
votes
0answers
20 views

QGIS algorithms do not work on copies of shapefiles?

I'm using QGIS 2.6.0. I'm trying to run various algorithms such as "SAGA/Shapes-points/remove duplicates" & "SAGA/Shapes-Grid/Add grid values to points" through the sextant toolbox. When I run ...
1
vote
1answer
20 views

Merging multiple tables using SQL in CartoDB

I have 5 separate tables in CartoDB each with a varying number of columns, but all containing these 4 columns (the_geom, name, type, unit_code). I want to merge them all into 1 new table and get rid ...
0
votes
0answers
7 views

SQL query syntax for NDVI grid in ArcGIS for Desktop?

I am trying to extract by attribute pixels with a Value >0 (i.e., the vegetation in an NDVI grid file) in ArcGIS. Every time I try to extract by attribute (spatial analyst tools/extraction), my SQL ...
1
vote
2answers
23 views

Remove a layer from TOC in my printed PDF?

I am new at writing Python code so I'm just grasping the basics. I am trying to clip two shapefiles so that they are within the map boundaries. After that, I want to remove the unclipped layers and ...
2
votes
1answer
17 views

Editing polygons simultaneously in ArcMap?

I have two polygons: How can I reshape both Polygon 1 and Polygon 2 at the same time? Will the area of each polygon change automatically in the table after reshaping? I'm using ArcMap 10.1.
1
vote
0answers
20 views

Waiting on AJAX result in main JS function

So .... my main init()Javascript function has these 3 lines: sarea = GetArea(Uname,UIDfield,Table, document.getElementById("Source").value); darea = GetArea(Uname,UIDfield,Table, ...
2
votes
1answer
18 views

Error converting a raster to polygons

When I am converting a raster using the polygonize tool, I get this error: ERROR 4: 'C:/Users/Vitor/Desktop/Cartografia EE_Portimo/COS RASTER/cos_raster_reeditada.tif' does not exist in the file ...
0
votes
0answers
30 views

Tool to create triangle buffer using Python in ArcGIS Desktop?

I want to make a tool to create triangle buffer by python script in ArcGIS, like circle buffer that we use it in ArcGIS Desktop? I need a tool that allows user to input the length of sides of the ...
0
votes
0answers
7 views

Adding a map service in ArcPad 10.2.1 leads to error “ HTTP error 400”

Despite the fact that I have followed the three rules in order to read an map service in ArcPad 10.2.1 The map service must use the Web Mercator projection. You must create a map cache on ...
-6
votes
1answer
29 views

From what latitude can you only travel south? [on hold]

From what latitude can you only travel south, and from what latitudes can you only travel north? This question is probably extremely easy and I'm just over thinking it. Some explanations would be ...
0
votes
0answers
9 views

Geocode not finding some locations

Most of my data is geocoding in cartodb except a handful. I've verified the location exists using google maps but it's still not coding it. For example, here's a location it's unable to code: 3641 ...
2
votes
1answer
70 views

Coordinate system doesn't contain values in the range -180 to 180 and -90 to 90

I'm creating an android version of a PC program (I've contacted the company who owns the PC program, so it's legal). The program is in the core a GPS, but is used to navigate pre-defined routes for ...
0
votes
0answers
8 views

Why are rows automatically deleted after inserting them into attribute table?

In ArcMap 10.2 I go into Editor mode and Start Editing. After this I insert a new row into an attribute table and if I click on Save Edits, the newly inserted row is disappear. What is the problem? ...
0
votes
1answer
10 views

Work order: project then resample, or resample then project

I'm working with 10m DEMs in northern New York, along the Canadian border (in ArcGIS 10.2). To complete a regional elevation map (and eventually slope, flow, etc.), I need to also include a portion of ...
2
votes
1answer
17 views

Direct Geodesic with Point 2 Azimuth

I am trying to find a way to calculate the direct problem on the WGS-84 ellipsoid but instead of using the initial Azimuth (e.g. lat1, lon1, distance, fwd azi), I want to compute it with the reverse ...
1
vote
1answer
37 views

How to automatically create 10,000 sets of random points for further analysis in QGIS?

I'm using QGIS and would like to know if I can automate generating multiple sets of random points and mean distances? I have a data set consisting over 600 coordinate points for Mistletoe across ...
0
votes
0answers
9 views

How to relate data values from two raster layers?

This is my second posting ! 1 Background I have a number of ASCII files containing a set of single values X, each set in a 1km x 1km grid – the start of each file looks like this: NCOLS 700 ...
0
votes
0answers
6 views

How to calculate interval areas in raster?

I would like to know if is possible and how can i calculate the areas from class intervals in one raster? All help is appreciated, Best regards
3
votes
1answer
33 views

How to display OSM relations (in QGIS) from osm2pgsql populated PostGIS DB

I have a PostGIS DB populated with OSM data (osm2pgsql, standart.style). Now I would like to display a hiking trail (http://www.openstreetmap.org/relation/51855). It would also be fine, if I just ...
0
votes
1answer
25 views

Water diving and depth measuring equipment

We go to villages and forest to deepwell rig for water. Can anyone help in identifying a GPS and water depth measurement devices please? we do 4-6" deepwell rigging for ground water in mozambique ...
0
votes
1answer
26 views

PostGis - BBox -vs- ST_intersects Queries

CartoDb Recommend here that the following query is faster than an St_intersects Query SELECT * FROM {table_name} WHERE the_geom && ST_SetSRID(ST_MakeBox2D(ST_Point(-73.9980, 40.726), ...
0
votes
0answers
8 views

Missing points and points in wrong area [on hold]

I am just starting with CartoDB. I am using city name (excel document) to plot points and although it gives me a geo for all cities, some points are not in the right state and others are missing all ...
2
votes
2answers
25 views

Python Script tools for ArcGIS 10.2 is very slow (get raster properties)

I am using python script tools for ArcGIS 10.2, under Windows 8.1 64bit. When I am using the arcpy.GetRasterProperties_management() command, it's very slow to process the data. For example. I tried ...
0
votes
1answer
8 views

ArcGIS Server 10.2.2 - Map Export Sometimes Returns Blank Image

I've run into a fun little issue with ArcGIS Server 10.2.2 to end my week with... I have discovered today that the export operation (the one that renders map layer images) is randomly returning blank ...
0
votes
0answers
5 views

displaying coded names in the grid

I am trying to display coded names (treespecies) in the grid, instead of values using arcgis java script. It says updateFeature is undefined. Below is my entire code, which I tried. <!DOCTYPE ...
0
votes
0answers
8 views

CartoDB Torque script causing JQuery UI conflict

I am using the torque library hosted here: https://github.com/CartoDB/torque I am using it in a viz.json-based visualization (so the torque layer is defined in the cartodb web console.) When I try to ...
0
votes
0answers
9 views

General function failure Error opening feature class in ArcGIS for Desktop? [duplicate]

I keep getting this General function failure: The screw-up happening when I clicked "delete field" on a field I had just created, in the attribute table for the feature class. This is a class ...

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