0
votes
0answers
2 views

How to add Lat and Long to the attributed table in ArcGis 10.2

i am new ArcGis 10.2 user and I have the attributed data for the land cover type (I use Raster to point tool) but it does not have the exact latitude and Longitude at the point. Could anyone please ...
0
votes
0answers
3 views

What percentage of polygon x is in raster pixel y, efficiently

I feel this is a competition worthy problem, due to its size. I would like to weight a set of raster pixels to the attributes of a set of polygons. To do this I need to know the proportion of each ...
0
votes
0answers
7 views

Need help on how to move a symbol over a map

I'm working in c++/qt and the c++ api qgis 2.8.2 In my application i load a map with a s57 file, this part works perfectly, now i need to make some plot representing different object like boat, plane, ...
0
votes
0answers
3 views

Png32 format in geodatabase file ArcGIS iOS SDK

I am developing an app using ArcGIS iOS Sdk. This app supports both online & offline modes of usage. Query: In Online mode I load the map using AGSDynamicMapServiceLayer and set the image format ...
0
votes
0answers
2 views

Querying through QueryTask takes more time if it has large number of data

Whenever I query my layer with queryTask it always returns 1000 maximum records. This makes to return the results very slow. Is there any alternative for queryTask to increase the performance of ...
0
votes
0answers
7 views

Delete-inserting is more efficent than updating in a common database?

For one table, updating may include traversing each row to searching the difference between the old and new. And Updating the changed rows. But Delete-inserting may looks more simple, it's just need ...
1
vote
0answers
7 views

QGIS expression builder include relation attributes

I have a set of symbols based on a table in postgis such as this id|type|action_1|action_2|geom In QGIS I have this table symbolised using a rule expression which works effectively. However this ...
0
votes
0answers
8 views

“Unable to load PROJ.4 library (libproj.so)” while transforming coordinate systems with ogr2ogr

I try to reproject some shapefiles with ogr2ogr. However, I always get the following error: ERROR 6: Unable to load PROJ.4 library (libproj.so), creation of OGRCoordinateTransformation failed. Failed ...
0
votes
0answers
4 views

Is it possible to view different layers in different viewers in ArcScene?

I want to create a fly around of a mine dump in ArcScene. I know that I can add a viewer(s) and create different perspectives of the main scene. But is it possible to have for example an aerial ...
0
votes
0answers
17 views

Understanding “Creating Layer From Selected Features.”

I used the “Create Layers From Selected Features” a lot as working with sunsets of a database is typically more efficient in ArcGIS (v. 10.3). Recently I had a project when I was trying to determine ...
1
vote
1answer
33 views

Erase shapfile (polygon) area from GeoTIFF

I've been reading several posts to do so and one option would be to use gdalwarp -cutline, but I would need to keep what it is NOT inside the polygon area. GDAL or any command-line tool does that? ...
4
votes
1answer
29 views

What is the future of CartoCSS (i.e. does it have one)?

MapBox recently announced that they would be moving away from CartoCSS towards a completely visual interface. Apparently the new style sheets that underlay that UI will be JSON based, so despite the ...
0
votes
2answers
19 views

Selective labeling with QGIS

I have a layer where shapes are defined by rules (country) and secondly by categories (a type). I then select (check box) the country to show the shapes only for that country. This works very well, ...
0
votes
1answer
27 views

Arcpy.Delete_management() not deleting folder?

I've written a script in Python that takes in two ascii files that represent surfaces, then convert them to Rasters, and finally Negate their values (i.e. multiply all cells by -1). In the script, I ...
0
votes
1answer
7 views

In QGIS, add to existing dem tiles and expand corresponding contour coverage within a project

In my first QGIS project I have dozens of digitized layers that have spread beyond the contour and dem tile area that I started with. Please recommend how to safely expand or replace the dem and ...
0
votes
0answers
5 views

is the “configuration dialog” = “Processing” > “Options”

Is the the "configuration dialog" referenced to in help "Processing" > "Options" Note: The 'help' I am referring to is the online Documentation QGIS 2.2 » QGIS User Guide » QGIS processing framework ...
-1
votes
0answers
5 views

NCAR and ArcGIS integration (time lapse)?

I've downloaded several climate files from the NCAR Climate Change model, however, I can't seem to enable a time lapse or put more that one layer over continents (ie total precipiation, land surface ...
0
votes
1answer
10 views

osgeo4w not installing processing tools in QGIS toobox.

I have uninstalled and reinstalled QGIS several times from the OSGeo4W application. I have done this with no problem on several other times, but now I cannot get the tools to load. Most of the help ...
0
votes
1answer
17 views

Caching data locally using ArcGIS for Server?

Our organization currently works with our data over the network, which causes huge slow-downs. We'd like to have everyone working off the data on their local drives to speed things up, and exploring ...
0
votes
0answers
4 views

Is there an alternative to ArcGIS Composite Template in the Production Mapping extension?

Is there a GIS tool to create a composite template without having the Production Mapping extension? I have ArcMAP Basic available as well as any open source software. The composite template ...
-1
votes
1answer
10 views

Reclassification from selected integers to text descriptions in a new field [on hold]

I know this is going to be a very simple answer because I was able to do this but after a couple of months of not using Arcmap forgot how to do it: in an attribute table I have an attribute "WPC" ...
0
votes
0answers
8 views

Why is azimuth resolution worse than range resolution in Sentinel1 (SAR)

Why is the azimuth resolution in Sentinel (SAR sensor) worse than the range resolution? The table in this link gives the resolution for SLC products aquired in the different aquisition modes. In ...
0
votes
0answers
5 views

Nominatim CentOS 7 Install Problem

The Problem: I've installed Nominatim on CentOS 7 because I want to do some reverse geo-coding, however, when I try to load the and create a Nominatim database with this command: ./utils/setup.php ...
0
votes
0answers
4 views

Using php to edit CartoDB infowindow?

Perhaps a basic question, but can php code be used in editing the CartoDB infowindow HTML? We want to show or hide a category depending on the value.
0
votes
0answers
11 views

Defining and exporting a path from discrete points in QGIS

I'm working with elevation data (NED, SRTM, etc.) in QGIS and I'm wondering how I might be able to pick a set of points from my map and export the coordinates to something like CSV. For example, I'd ...
1
vote
1answer
26 views

Python for select by attribute then remove from current selection

I have a table called"July_join". Within this table I have many attributes or columns. I want first to select every thing under "grade" column that has values of 90, then remove from this selection ...
0
votes
1answer
23 views

Problem doing a coordinate transform with GDAL python

I'm trying to do a concordant transform from the format of the shapefile (3309) to google maps(4326). This code works on one Centos 6.6 box with the SCL python 2.7 and a custom gdal 2.0 build. ...
0
votes
0answers
25 views

Computational Geometry Problem

I have following datasets- Road network (line) Waterbodies data (polygon) School locations (point) Suberb boundaries (polygon) Property boundary -buildings (polygon) What i want- Generation of ...
9
votes
3answers
194 views

What is the meaning of “Elevation above the surface of the ellipsoid”?

I'm using implementation of Vincenty's algorithms, and I have their class called "position" that requires lat, lon, and elevation defined by: "Elevation above the surface of the ellipsoid". What is ...
0
votes
1answer
20 views

SQL Server geometry vs. geography in Esri map service

We have a SQL Server 2008R2 database where point coordinates are stored as decimal degrees. I want to create an Esri map service which shows those points. As the point data is dynamic I decided to ...
1
vote
2answers
17 views

How do I toggle (add/remove) shapefile layers in Leaflet.js?

If I create a shapefile layer var ac_shpfile = new L.Shapefile("data/AC.zip", {onEachFeature: function (feature, layer) { /* Add some colors based on shapefile features */ }}); and then add it to ...
0
votes
0answers
20 views

Python Satellite Image Processing Resources [on hold]

What are some of the good resources (books, tutorials) to learn image processing with Python for a beginner.
0
votes
0answers
6 views

Group cities into MSA/Agglomerated areas

I've been asked to do some research where I compare survey data to some population numbers. Unfortunately, I think it is likely the case that people who live in smaller cities that are close to large ...
1
vote
0answers
9 views

Missing XML Attributes in Geoserver

I've imported a number of files that used to be in KML format into geoserver after putting everything into a PostGIS table. Now I would like to use CSS style information that was associated with the ...
0
votes
1answer
27 views

How do I classify my counties to color the bottom / top 25% in area?

I have a map of my state with county boundaries. What settings should I use to color the counties based on their area but only if its area falls in the bottom or top 25% of county area? For example, ...
0
votes
0answers
4 views

How can I display a local CartoDB viz.json?

I have a locally hosted CartoDB instance and have been happily playing with it for some time and enjoying all sorts of beautiful visualisations. There is some data ingested and I'd like to create a ...
1
vote
4answers
125 views

How to combine text and integers in a string field?

I have field with numbers in it (field type: double, number format: numeric) and I need to create a new field and put text in front of the numbers. I know that I need to add a new string field, but ...
1
vote
1answer
21 views

How to prompt for layer selection from python console in QGIS?

During script development it's useful to use the QGIS python console to test the same script on different layers. Currently I've been hardcoding layer strings and just swapping out but it isn't ...
0
votes
0answers
8 views

Calculating population statistics for postcode centroids

Perhaps this isn't really specifically a GIS question, but I've been using ArcMap to measure distances from the access points of green spaces in Bristol to postcode centroids and would like to use ...
1
vote
0answers
28 views

Repeating points by field using ArcGIS for Desktop?

I have a point layer in ArcGIS that has a field named "Population" that stores an integer value for every point in the layer. I want to create N points in the exact place of the feature that has N as ...
0
votes
1answer
14 views

QGIS Treat null as zero in raster calculator

In QGIS - I have an irregularly shaped raster - I wish to clip an irregular area out of it (call it raster A) with that area set to null. I masked the area (vector polygon) I want to remove and used ...
0
votes
0answers
10 views

CartoDB static maps with a bounding box

I'm using cartodb's static maps API to create a hi-def printable map. The map is placed on top of a basemap generated in Mapbox studio. Looks pretty good but I have an issue that prevents me to ...
0
votes
0answers
6 views

Representation of streets/highways Geometry

I have Navtech data which provides center-lines with geometric data of the roads. The most important data for me is that it gives me the width of the road as well as the number of lanes for most of ...
0
votes
0answers
26 views

How to add rule and add feature class to topology using arcpy and stop getting error 000732?

This script successfully added feature classes to topology when that is all I had scripted it to do. Now I've added the add rule parts (#added) and it's still just adding feature classes without ...
0
votes
2answers
21 views

Determine Angle of Street by Parsing an Overpass-Turbo output xml

I am currently downloading all the street intersections from a bounding box using the query below (see it on overpass). <query type="way" into="hw"> <has-kv k="highway"/> <has-kv ...
1
vote
2answers
44 views

How to debug Esri script tools

So, I recently got an script tool to play with. The tool itself is contained in a tbx file. So, the problem: I'd like to see how the tool runs in a debugger to get a better idea of how it works. I've ...
4
votes
1answer
29 views

How to find all points with certain elevation difference between them in QGIS

I have a point layer (xyz) and want to find all points that have elevation difference of 200m or more. I would like to then draw a line between each pair with the largest elevation difference. The ...
0
votes
0answers
7 views

jquery + openlayers 3

I am trying to put a map in a jquery tab. The end goal is to use it in a web app. I can get it working, but as soon as the map code goes into the app, the map disappears. I am trying to figure out ...
1
vote
0answers
9 views

CartoDB SQL 'Insert Into' vanishes with no error in Safari

I have a little application that allows users to search for locations on a mac submit comments to a CartoDB database using an HMTL form, JavaScript and SQL (and a little PHP to make the API connection ...
0
votes
1answer
15 views

Sub-Shapefile Attribute Ineritance

I have two shapefiles: a shapefile of plant communities: each polygon there covers a wide swath of land and names the plant community there. I also have another shapefile that identifies a bunch of ...

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