0
votes
0answers
4 views

Address locater returns no objects found

Trying to build an address locator for the following feature case But unfortunately when I use find locations it finds no object What might be the issue here ?
0
votes
0answers
7 views

How to use field calculator in QGIS to calculate new coordinates, and use that new columm to geolocate a layer's points

In a separate question, at How to shift a CRS by an observed offset, I asked about shifting a CRS to align the problems aligning data points with a satellite image obtained from OpenLayers. (They ...
-1
votes
0answers
21 views

Good thesis topics for GIS?

Actually I did intern-ship in flood inundation study of river by using Arc GIS and HEC-GeoRAS so I want to do my thesis related to this with more advancement...any ideas !!
2
votes
0answers
8 views

clip layers in spatialite

I'm pretty new to databases and SQL, so sorry for the noise.. I have 2 layers and I want to make a clip of layer 1 with layer 2 in SpatiaLite (I'm using the DB Manager within QGIS). That's the code ...
1
vote
1answer
30 views

QGIS 2.6 Auto Open Form

Windows 7 QGIS 2.6 - 64 bit Feature - Identify Results Could someone help me understand what is "Auto Open Form" checkbox used for.
2
votes
0answers
33 views

Comparing floor and roof areas using QGIS?

I am pretty new in this GIS topic and I would really appreciate if someone can help me with this problem. I am doing a research for university that shall show the available roof area for ...
0
votes
0answers
14 views

Importing segmenation results from Python to eCognition

I used OpenCV watershed segmentation to create segmented objects. However, I don't know how to import the polygon objects created (objects inside the blue circle) into eCognition.
1
vote
0answers
28 views

Finding census block with highest pop. value within the census tract

In QGIS, I'm trying to plot a centroid of only the census block with the highest population within each census tract. So there should only be one point per tract- that of the block with the greatest ...
1
vote
0answers
14 views

How to shift a CRS by an observed offset

I have a drone image is which is geo-referenced over a Google Sat. image. These align well, and both use WGS84-Pseudo Mercator (EPSG:3857). I have a set of data points in a shape file which are ...
1
vote
0answers
12 views

Popup with related tables

I'm finding difficulties displaying values of a related table in a popup window. Esri said that at version 3.10 and above, popup templates can include fields from related tables using the syntax ...
1
vote
1answer
31 views

how to Find nearest line for the given point from a collection of lines?

I have table with lines(linestring).For a point wich i give it , I want to find out nearest line in point. I almost developed a query, but it is return the same line every point i give. the query ...
0
votes
0answers
7 views

problem serving MBTiles with Geoserver plugin

I'm creating a webmap, and hoping to add a few basemap/raster layers of my own. I'll be using a stack that includes GeoServer which is fine for vector data, but I'd like to serve the new basemap ...
0
votes
0answers
13 views

implement aspect in least cost path analysis to account for downhill and neutral ground movement

I am creating a least cost path model for large species that migrate over large distances across a rugged landscape (elk, deer, etc.) To calculate movement cost I am using a slope raster but I ...
1
vote
1answer
18 views

Moving dead ahead: rhumb line, great circle or none

I think I understand the whole rhumb line and great circle idea but I can't seem to find an answer on this question. Suppose I am driving a car (i don't use ship because I don't want to put the ...
0
votes
0answers
14 views

Filling polygons automatically

How we can fill polygons automatically like in this example, we have two type of polygons(pink and black) , the first type the black polygons, should grow to occupy the void area between the black ...
1
vote
0answers
16 views

Data format in ERDAS IMAGINE 2014?

I performed radiometric correction analysis on Landsat 8 image ( format: integer unsigned 16 bit) in ERDAS IMAGIN 2014. However, the output image would be created if I could select format: float 32 ...
1
vote
1answer
49 views

How to determine Affine Transformation Parameters?

I try to use the qgsAffine plugin to do the transformation. But no idea in its usage. Anyone can post an example. Many thanks!! How to find the transformation parameters? I found some posts suggest ...
1
vote
1answer
16 views

Add a certain number of days for a date field

I have one field for a permit decision date, and then I have another field for 180 days from that permit date. The permit date field has data entered, but the 180 day field I would like to calculate ...
1
vote
0answers
48 views

Python Basemap fails

I am using Anaconda 2.1.0 and Basemap installation is successful conda install basemap However, I keep getting the following error when I try to project lat,lon to a planar: Assertion failed: (0), ...
2
votes
0answers
46 views

How to get an ArcGIS custom tool to run fom the command line?

I have been experimenting with ESRI's CalculateArea custom tool and it works fine running within ArcGIS from a toolbox. Then I wanted to see if I could run it as a standalone script from the ...
1
vote
1answer
22 views

How to invoke a WFS service from command line?

I've the following WFS GetFeature request .... ...
3
votes
2answers
29 views

Generic term for CRS axes?

We're making a light web front to a database, and I saw this in a test screenshot: Despite those coordinates being nowhere near North America, the "latitude/longitude" label for those coordinates ...
0
votes
1answer
18 views

Line dash not working OL3 (Openlayers 3)

I want to display a dashed line in a vector layer, as the it's shown in the Documentation there is a propriety called lineDash , but it didn't work for me here my code : var iconStyle_line = new ...
0
votes
0answers
17 views

Error generating using SAGA

I am trying to generate a Slope Curvature Raster in Saga, but i am always getting the same error (images with the errors below). And when i use GRASS it generates with no problems. What could be the ...
0
votes
1answer
26 views

eliminate small polygons of a PNG with gdal_sieve

I want to eliminate polygons wich consist of less than 3550 px in this PNG . I tried using gdal_sieve but there seems to be an error. gdal_sieve -st 3550 E8.png -of PNG E8sieve3550_4.png ERROR 6: ...
0
votes
0answers
12 views

Address Locator “Geocoding service”

I've already created an Address Locator sucessfuly and published it as a Geocoding service, but I need to verify that its working from the rest since its not working from my web mapping application ...
0
votes
1answer
18 views

how to generate NDVI with multi channel images?

I have a 6 channel proprietary camera and I need to create a NDVI map. I created a map from each band, so now I have 6 files each one on a different band width. How can I proceed now? I am using QGIS ...
0
votes
1answer
20 views

Default password for geoserver 2.1.4 not working

I have installed geoserver 2.1.4 on Ubuntu 10.04 i have jetty running on port 90. I get to the login screen. I introduce user: admin password: geoserver and i am getting that user or passowrd are not ...
1
vote
1answer
33 views

Why are representations functions accessible in Table of Contents not in Catalog window of ArcMap?

It's really frustrating that adding a new representation form the Catalog window of ArcMap does not work while it works for TOC when adding the required lyr file as a symbology then right click and ...
0
votes
0answers
10 views

How can i read a DGN file by DotSpatial in VB.Net?

I am new in DotSpatial and want to develop a program for converting DGN to Shapefile. I had to use opensource components. At first i want to open a DGN(ver.8). Please give me a hand.
-2
votes
0answers
17 views

How to work data driven page with arcpy? [on hold]

Can somebody share any video or something how to work with data driven page with arcpy?
1
vote
0answers
37 views

Area in KM from Polygon of coordinates

I have polygons from coordinates in (python shapely) that looks like this POLYGON ((24.8085317 46.8512821, 24.7986952 46.8574619, 24.8088238 46.8664741, 24.8155239 46.8576335, 24.8085317 46.8512821)) ...
0
votes
0answers
15 views

Spatial Reference Conversion

I am currently having some problem with the spatial reference projection on the map in Android. Basically I have a base map which is OneMap and all the coordinates stored in database is in SVY21 ...
-3
votes
0answers
20 views

c++ qgisvector layer is not Valid [on hold]

#include <QtCore> #include <QApplication> #include <QWidget> #include <qgsapplication.h> #include <QMainWindow> #include <qgsmapcanvas.h> #include ...
1
vote
0answers
25 views

OL3 27700 WMS inspire

I am just getting into OL3 from a GIS background - I don't have much of a programming background. I am trying to use WMS layers from inspire in an OL3 app ...
2
votes
0answers
35 views

Finding and using data on population density files

I'm new to GIS and been trying to figure so many things out on my own by using QGIS. Now on to my question. I'm attempting to replicate this map for the state of Nevada: ...
1
vote
0answers
25 views

how to automatically update column based on the second layer, trigger, postgreSQL

I am newbie in postgreSQL. I have 2 tables, observation and landcover, i want to create a trigger which would allowed to update the column observation.land based on the spatial information according ...
1
vote
1answer
26 views

Route and distance measuring

I'm looking for a plugin that can make a route from given GPS points and then calculate the distance of this route. I'm going to create GPS points and import it to Qgis as a GPX file. I know I can ...
-1
votes
1answer
34 views

Search layer in MXDs

I work on arcview 10.3 and i try to find layer called "ways" in several mxds. i try this code but it does not work. anyone know how to do it?: import arcpy,os,sys,string import arcpy.mapping from ...
0
votes
0answers
13 views

How to use ArcGIS rest services with mapsforge or osmdroid?

I want to use ArcGIS rest services with mapsforge or osmdroid . How can i use dynamic map service of ArGIS for server ith osmdroid ? I just want to show a dynamic map with mapsforge or osmdroid? Does ...
2
votes
0answers
30 views

Compute for shortest/perpendicular distance between track point and centerline

I am working on a python school project that uses gpx tracks from different devices. Latitude, Longitude, Elevation and Timestamp are the only information that are constantly available. HDOP, Speed, ...
4
votes
1answer
43 views

How to add Attributes to a polygon with arcpy

I have a question about arcpy. I want to create a polygon FeatureClass with attributes. The code below is just test-code that generates some polygons for speed testing. I want to add some additional ...
0
votes
0answers
44 views

How to inverse Y axis

I have a SQLlite database containing cached tiles with X,Y,Z fields and I want to use it in MapCache. My Y field is appearing upside down in Google tile index but I want to inverse it like this: ...
0
votes
0answers
11 views

Representing a line feature layer with Markersymbols in ArcGIS JS API

I am setting a scale dependant renderer for a Featurelayer (geometry type =line) so that in smaller scale it can represented as a marker symbols and in higher scale with a Line symbols. When I tried ...
2
votes
0answers
19 views

Help getting a Mathematical Representation within a Layer's Attribute Table

I'v been playing around with Vector Coding and was wondering if there was any Plugins out there that might let me represent Vectors within a layer as it's Mathematic attributes in the Layer's ...
1
vote
0answers
29 views

How to create a boundary vector of objects after using watershed_segmentation python

I used watershed segmentation in opencv-python to separate object. However, after segmentation I don't know how to create boundary polygons of objects (red rounded in the image attached). Thanks ...
-1
votes
0answers
32 views

Recommend for GIS Professional using the ArcGIS Server as a beginner [on hold]

What is the recommend for the GIS Professional beginner to learn about ArcGIS server and do I need to install the software separately from the original ArcGIS Desktop DVD ? I am using ArcGIS 10.1 ...
0
votes
1answer
20 views

geometries with different SRIDs errors (even after setting SRID)

I've looked at existing questions about this (including this one) and followed the advice that was shared there. I'm still seeing this when I run some queries: RuntimeError: Postgis Plugin: PSQL ...
1
vote
1answer
39 views

Mirror two data frames

Is it possible to link two data frames so that they mirror each other? I know I can set the extent of one data frame to that of another data frame, but then you can only pan/zoom in the parent frame. ...
0
votes
0answers
11 views

Overlay layer not displayed above Base layer for custom panels of Leaflet.groupedlayercontrol plugin

I created simple web map (example http://jsfiddle.net/q77wk17z/1/) with one Overlay and several Base layers using Leaflet.groupedlayercontrol plugin. Overlay and Base layers divide on separate layer ...

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