geo-l1-capetown-building-centroids
Map (reference ← swipe → agent)
0:00
The addressing tool only renders points, so I need a centroid layer off `capetown_buildings` — one centroid per footprint. Keep the building IDs so we can join back to the polygon master later: ensure the output carries a `building_id` column with the building identifier from the input. Every row must have a non-empty `building_id`.
Write the result to `building_centroids.geojson` as a GeoJSON FeatureCollection with Point geometry only and the `building_id` column described above.
0:00
System info
{
"adapter": "openrouter",
"model": "deepseek/deepseek-v4-flash",
"base_url": "https://openrouter.ai/api/v1"
}
0:03
Let me first explore the working directory to understand what data files are available.
0:03
Bash
ls -la /work/
total 48 drwxr-xr-x 1 agent agent 220 Jun 16 23:42 . drwxr-xr-x 1 root root 14 Jun 16 23:42 .. -rw-r--r-- 1 agent agent 5 Jun 16 23:42 capetown_buildings.cpg -rw-r--r-- 1 agent agent 9948 Jun 16 23:42 capetown_buildings.dbf -rw-r--r-- 1 agent agent 408 Jun 16 23:42 capetown_buildings.prj -rw-r--r-- 1 agent agent 22916 Jun 16 23:42 capetown_buildings.shp -rw-r--r-- 1 agent agent 1076 Jun 16 23:42 capetown_buildings.shx
0:09
Let's first inspect the shapefile to understand its structure, especially the building ID field.
0:09
Bash
cd /work && python3 -c "
cd /work && python3 -c "
import geopandas as gpd
gdf = gpd.read_file('capetown_buildings.shp')
print('Columns:', gdf.columns.tolist())
print('Shape:', gdf.shape)
print('CRS:', gdf.crs)
print('---')
print(gdf.head())
print('---')
print(gdf.dtypes)
"
Columns: ['building_i', 'geometry'] Shape: (122, 2) CRS: EPSG:32734 --- building_i geometry 0 BLD00001 POLYGON ((261901.274 6243490.255, 261869.707 6... 1 BLD00002 POLYGON ((261917.732 6243289.478, 261986.733 6... 2 BLD00003 POLYGON ((261757.159 6243198.786, 261777.731 6... 3 BLD00004 POLYGON ((261697.528 6243474.206, 261685.886 6... 4 BLD00005 POLYGON ((261900.978 6243296.017, 261897.556 6... --- building_i str geometry geometry dtype: object
0:20
The input has a column `building_i` (likely "building_id" in abbreviated form) with string identifiers like "BLD00001". I need to: 1. Compute centroids of each polygon 2. Rename `building_i` to `building_id` 3. Ensure every row has a non-empty `building_id` 4. Write to GeoJSON FeatureCollection with Point geometry only Let me check if any building_id values are empty.
0:20
Bash
cd /work && python3 -c "
cd /work && python3 -c "
import geopandas as gpd
gdf = gpd.read_file('capetown_buildings.shp')
print('Null building_i:', gdf['building_i'].isna().sum())
print('Empty building_i:', (gdf['building_i'] == '').sum())
print('Any empty/None:', (gdf['building_i'].isna() | (gdf['building_i'] == '')).sum())
"
Null building_i: 0 Empty building_i: 0 Any empty/None: 0
0:26
Now I have the info. The input shapefile has a `building_i` column (the building identifier) and polygon geometries. I need to: 1. Compute centroids for each polygon 2. Keep the `building_i` column, rename it to `building_id` (the instruction says "ensure the output carries a `building_id` column") 3. Write to GeoJSON FeatureCollection with Point geometry only Let me write the script.
0:26
Write
/work/solve.py
content · 14 lines · py
import geopandas as gpd
# Read the buildings shapefile
gdf = gpd.read_file('/work/capetown_buildings.shp')
# Compute centroids, keeping all attributes
centroids = gdf.copy()
centroids['geometry'] = centroids['geometry'].centroid
# Rename building_i to building_id as required
centroids = centroids.rename(columns={'building_i': 'building_id'})
# Write to GeoJSON
centroids.to_file('/work/building_centroids.geojson', driver='GeoJSON')Wrote /work/solve.py (438 chars).
0:30
Let me run this script and verify the output.
0:30
Bash
cd /work && python solve.py
(no output)
0:35
0:35
Read
/work/building_centroids.geojson
1 {
2 "type": "FeatureCollection",
3 "name": "building_centroids",
4 "crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:EPSG::32734" } },
5 "features": [
6 { "type": "Feature", "properties": { "building_id": "BLD00001" }, "geometry": { "type": "Point", "coordinates": [ 262131.638792031881167, 6243436.711768977344036 ] } },
7 { "type": "Feature", "properties": { "building_id": "BLD00002" }, "geometry": { "type": "Point", "coordinates": [ 261950.75084399577463, 6243258.840989681892097 ] } },
8 { "type": "Feature", "properties": { "building_id": "BLD00003" }, "geometry": { "type": "Point", "coordinates": [ 261763.585578397964127, 6243178.854383068159223 ] } },
9 { "type": "Feature", "properties": { "building_id": "BLD00004" }, "geometry": { "type": "Point", "coordinates": [ 261684.817521843971917, 6243473.067511764355004 ] } },
10 { "type": "Feature", "properties": { "building_id": "BLD00005" }, "geometry": { "type": "Point", "coordinates": [ 261890.234551712492248, 6243301.424077236093581 ] } },
11 { "type": "Feature", "properties": { "building_id": "BLD00006" }, "geometry": { "type": "Point", "coordinates": [ 261835.293357033136999, 6243248.079076459631324 ] } },
12 { "type": "Feature", "properties": { "building_id": "BLD00007" }, "geometry": { "type": "Point", "coordinates": [ 261589.891310407721903, 6243101.680418615229428 ] } },
13 { "type": "Feature", "properties": { "building_id": "BLD00008" }, "geometry": { "type": "Point", "coordinates": [ 261781.988127802236704, 6243198.737664030864835 ] } },
14 { "type": "Feature", "properties": { "building_id": "BLD00009" }, "geometry": { "type": "Point", "coordinates": [ 261624.147468659415608, 6243075.243635028600693 ] } },
15 { "type": "Feature", "properties": { "building_id": "BLD00010" }, "geometry": { "type": "Point", "coordinates": [ 261572.987168132065563, 6243473.199407855980098 ] } },
16 { "type": "Feature", "properties": { "building_id": "BLD00011" }, "geometry": { "type": "Point", "coordinates": [ 261917.825281739700586, 6243494.499586606398225 ] } },
17 { "type": "Feature", "properties": { "building_id": "BLD00012" }, "geometry": { "type": "Point", "coordinates": [ 261986.859395199368009, 6243560.40387899428606 ] } },
18 { "type": "Feature", "properties": { "building_id": "BLD00013" }, "geometry": { "type": "Point", "coordinates": [ 261906.02230396453524, 6243404.50024475902319 ] } },
19 { "type": "Feature", "properties": { "building_id": "BLD00014" }, "geometry": { "type": "Point", "coordinates": [ 261610.730359424225753, 6243449.687038578093052 ] } },
20 { "type": "Feature", "properties": { "building_id": "BLD00015" }, "geometry": { "type": "Point", "coordinates": [ 261537.629191326122964, 6243505.811420646496117 ] } },
21 { "type": "Feature", "properties": { "building_id": "BLD00016" }, "geometry": { "type": "Point", "coordinates": [ 261884.607977945619496, 6243255.661137802526355 ] } },
22 { "type": "Feature", "properties": { "building_id": "BLD00017" }, "geometry": { "type": "Point", "coordinates": [ 261718.383000419300515, 6243102.938173878006637 ] } },
23 { "type": "Feature", "properties": { "building_id": "BLD00018" }, "geometry": { "type": "Point", "coordinates": [ 261727.429730886069592, 6243222.720740261487663 ] } },
24 { "type": "Feature", "properties": { "building_id": "BLD00019" }, "geometry": { "type": "Point", "coordinates": [ 261861.869877992983675, 6243236.077358078211546 ] } },
25 { "type": "Feature", "properties": { "building_id": "BLD00020" }, "geometry": { "type": "Point", "coordinates": [ 261614.627236885455204, 6243068.642089530825615 ] } },
26 { "type": "Feature", "properties": { "building_id": "BLD00021" }, "geometry": { "type": "Point", "coordinates": [ 261499.548677426122595, 6243431.450468068942428 ] } },
27 { "type": "Feature", "properties": { "building_id": "BLD00022" }, "geometry": { "type": "Point", "coordinates": [ 261507.90726213727612, 6243425.021246627904475 ] } },
28 { "type": "Feature", "properties": { "building_id": "BLD00023" }, "geometry": { "type": "Point", "coordinates": [ 261555.704312736488646, 6243146.157597349025309 ] } },
29 { "type": "Feature", "properties": { "building_id": "BLD00024" }, "geometry": { "type": "Point", "coordinates": [ 261702.147422312758863, 6243456.006432028487325 ] } },
30 { "type": "Feature", "properties": { "building_id": "BLD00025" }, "geometry": { "type": "Point", "coordinates": [ 261619.548179036268266, 6243489.916278632357717 ] } },
31 { "type": "Feature", "properties": { "building_id": "BLD00026" }, "geometry": { "type": "Point", "coordinates": [ 261616.011157239903696, 6243086.34703513700515 ] } },
32 { "type": "Feature", "properties": { "building_id": "BLD00027" }, "geometry": { "type": "Point", "coordinates": [ 261574.107736374251544, 6243409.422756239771843 ] } },
33 { "type": "Feature", "properties": { "building_id": "BLD00028" }, "geometry": { "type": "Point", "coordinates": [ 261534.045979948132299, 6243236.628336590714753 ] } },
34 { "type": "Feature", "properties": { "building_id": "BLD00029" }, "geometry": { "type": "Point", "coordinates": [ 261911.961483059305465, 6243256.552792651578784 ] } },
35 { "type": "Feature", "properties": { "building_id": "BLD00030" }, "geometry": { "type": "Point", "coordinates": [ 261513.774043545563472, 6243389.595432297326624 ] } },
36 { "type": "Feature", "properties": { "building_id": "BLD00031" }, "geometry": { "type": "Point", "coordinates": [ 261852.311225418467075, 6243268.200233204290271 ] } },
37 { "type": "Feature", "properties": { "building_id": "BLD00032" }, "geometry": { "type": "Point", "coordinates": [ 261909.922381222859258, 6243346.346294059418142 ] } },
38 { "type": "Feature", "properties": { "building_id": "BLD00033" }, "geometry": { "type": "Point", "coordinates": [ 261522.473904877173482, 6243412.160163504071534 ] } },
39 { "type": "Feature", "properties": { "building_id": "BLD00034" }, "geometry": { "type": "Point", "coordinates": [ 261985.206111997511471, 6243279.325120592489839 ] } },
40 { "type": "Feature", "properties": { "building_id": "BLD00035" }, "geometry": { "type": "Point", "coordinates": [ 261814.732095874031074, 6243176.925034125335515 ] } },
41 { "type": "Feature", "properties": { "building_id": "BLD00036" }, "geometry": { "type": "Point", "coordinates": [ 261546.543205686262809, 6243378.791755308397114 ] } },
42 { "type": "Feature", "properties": { "building_id": "BLD00037" }, "geometry": { "type": "Point", "coordinates": [ 261513.84267028447357, 6243419.792899859137833 ] } },
43 { "type": "Feature", "properties": { "building_id": "BLD00038" }, "geometry": { "type": "Point", "coordinates": [ 261581.77977460323018, 6243467.63704274687916 ] } },
44 { "type": "Feature", "properties": { "building_id": "BLD00039" }, "geometry": { "type": "Point", "coordinates": [ 261804.802881522744428, 6243183.06578509695828 ] } },
45 { "type": "Feature", "properties": { "building_id": "BLD00040" }, "geometry": { "type": "Point", "coordinates": [ 261642.64695174433291, 6243389.229879218153656 ] } },
46 { "type": "Feature", "properties": { "building_id": "BLD00041" }, "geometry": { "type": "Point", "coordinates": [ 261867.039071617327863, 6243302.334499698132277 ] } },
47 { "type": "Feature", "properties": { "building_id": "BLD00042" }, "geometry": { "type": "Point", "coordinates": [ 261973.796485983853927, 6243153.972318775951862 ] } },
48 { "type": "Feature", "properties": { "building_id": "BLD00043" }, "geometry": { "type": "Point", "coordinates": [ 261867.788964764826233, 6243216.882179601117969 ] } },
49 { "type": "Feature", "properties": { "building_id": "BLD00044" }, "geometry": { "type": "Point", "coordinates": [ 261849.765907362685539, 6243123.401894940063357 ] } },
50 { "type": "Feature", "properties": { "building_id": "BLD00045" }, "geometry": { "type": "Point", "coordinates": [ 261510.722064266650705, 6243395.496956489048898 ] } },
51 { "type": "Feature", "properties": { "building_id": "BLD00046" }, "geometry": { "type": "Point", "coordinates": [ 261505.393321647337871, 6243427.845867826603353 ] } },
52 { "type": "Feature", "properties": { "building_id": "BLD00047" }, "geometry": { "type": "Point", "coordinates": [ 261804.490278987330385, 6243164.706951131112874 ] } },
53 { "type": "Feature", "properties": { "building_id": "BLD00048" }, "geometry": { "type": "Point", "coordinates": [ 261715.45840975624742, 6243446.98635321483016 ] } },
54 { "type": "Feature", "properties": { "building_id": "BLD00049" }, "geometry": { "type": "Point", "coordinates": [ 261687.002326081506908, 6243442.429412319324911 ] } },
55 { "type": "Feature", "properties": { "building_id": "BLD00050" }, "geometry": { "type": "Point", "coordinates": [ 261602.907239059422864, 6243315.160753601230681 ] } },
56 { "type": "Feature", "properties": { "building_id": "BLD00051" }, "geometry": { "type": "Point", "coordinates": [ 261887.751937871216796, 6243243.294068426825106 ] } },
57 { "type": "Feature", "properties": { "building_id": "BLD00052" }, "geometry": { "type": "Point", "coordinates": [ 261530.462585632893024, 6243419.472867692820728 ] } },
58 { "type": "Feature", "properties": { "building_id": "BLD00053" }, "geometry": { "type": "Point", "coordinates": [ 261710.611881642456865, 6243331.702824870124459 ] } },
59 { "type": "Feature", "properties": { "building_id": "BLD00054" }, "geometry": { "type": "Point", "coordinates": [ 261642.699427414714592, 6243508.509881547652185 ] } },
60 { "type": "Feature", "properties": { "building_id": "BLD00055" }, "geometry": { "type": "Point", "coordinates": [ 261861.045110561593901, 6243225.94049558788538 ] } },
61 { "type": "Feature", "properties": { "building_id": "BLD00056" }, "geometry": { "type": "Point", "coordinates": [ 261879.872820666700136, 6243232.085929224267602 ] } },
62 { "type": "Feature", "properties": { "building_id": "BLD00057" }, "geometry": { "type": "Point", "coordinates": [ 261672.821039227012079, 6243429.549716755747795 ] } },
63 { "type": "Feature", "properties": { "building_id": "BLD00058" }, "geometry": { "type": "Point", "coordinates": [ 261502.21752681711223, 6243393.738283893093467 ] } },
64 { "type": "Feature", "properties": { "building_id": "BLD00059" }, "geometry": { "type": "Point", "coordinates": [ 261748.211287205165718, 6243229.13979734107852 ] } },
65 { "type": "Feature", "properties": { "building_id": "BLD00060" }, "geometry": { "type": "Point", "coordinates": [ 261719.173691578354919, 6243451.277169507928193 ] } },
66 { "type": "Feature", "properties": { "building_id": "BLD00061" }, "geometry": { "type": "Point", "coordinates": [ 261729.030123538308544, 6243494.008927130140364 ] } },
67 { "type": "Feature", "properties": { "building_id": "BLD00062" }, "geometry": { "type": "Point", "coordinates": [ 261553.991726405452937, 6243427.15140830911696 ] } },
68 { "type": "Feature", "properties": { "building_id": "BLD00063" }, "geometry": { "type": "Point", "coordinates": [ 261923.134257087629521, 6243508.462191380560398 ] } },
69 { "type": "Feature", "properties": { "building_id": "BLD00064" }, "geometry": { "type": "Point", "coordinates": [ 261512.779497733077733, 6243413.198600405827165 ] } },
70 { "type": "Feature", "properties": { "building_id": "BLD00065" }, "geometry": { "type": "Point", "coordinates": [ 261787.552222981059458, 6243159.037453341297805 ] } },
71 { "type": "Feature", "properties": { "building_id": "BLD00066" }, "geometry": { "type": "Point", "coordinates": [ 261666.930604067718377, 6243280.137804824858904 ] } },
72 { "type": "Feature", "properties": { "building_id": "BLD00067" }, "geometry": { "type": "Point", "coordinates": [ 261713.883135316049447, 6243240.657966027967632 ] } },
73 { "type": "Feature", "properties": { "building_id": "BLD00068" }, "geometry": { "type": "Point", "coordinates": [ 261655.393893227243097, 6243497.6873748768121 ] } },
74 { "type": "Feature", "properties": { "building_id": "BLD00069" }, "geometry": { "type": "Point", "coordinates": [ 261546.322345719003351, 6243439.320291577838361 ] } },
75 { "type": "Feature", "properties": { "building_id": "BLD00070" }, "geometry": { "type": "Point", "coordinates": [ 261751.331707403965993, 6243380.091257060877979 ] } },
76 { "type": "Feature", "properties": { "building_id": "BLD00071" }, "geometry": { "type": "Point", "coordinates": [ 261625.706396485096775, 6243089.233050366863608 ] } },
77 { "type": "Feature", "properties": { "building_id": "BLD00072" }, "geometry": { "type": "Point", "coordinates": [ 261503.870065983297536, 6243406.890723002143204 ] } },
78 { "type": "Feature", "properties": { "building_id": "BLD00073" }, "geometry": { "type": "Point", "coordinates": [ 261577.022669163503451, 6243437.338017341680825 ] } },
79 { "type": "Feature", "properties": { "building_id": "BLD00074" }, "geometry": { "type": "Point", "coordinates": [ 261711.937240521190688, 6243442.709612671285868 ] } },
80 { "type": "Feature", "properties": { "building_id": "BLD00075" }, "geometry": { "type": "Point", "coordinates": [ 261746.325211207964458, 6243136.535842973738909 ] } },
81 { "type": "Feature", "properties": { "building_id": "BLD00076" }, "geometry": { "type": "Point", "coordinates": [ 261890.724635044549359, 6243277.1848075510934 ] } },
82 { "type": "Feature", "properties": { "building_id": "BLD00077" }, "geometry": { "type": "Point", "coordinates": [ 261722.012578892463353, 6243354.972939897328615 ] } },
83 { "type": "Feature", "properties": { "building_id": "BLD00078" }, "geometry": { "type": "Point", "coordinates": [ 261697.666726550785825, 6243464.349469745531678 ] } },
84 { "type": "Feature", "properties": { "building_id": "BLD00079" }, "geometry": { "type": "Point", "coordinates": [ 261678.524099603499053, 6243165.959363647736609 ] } },
85 { "type": "Feature", "properties": { "building_id": "BLD00080" }, "geometry": { "type": "Point", "coordinates": [ 261817.124112777673872, 6243409.410033184103668 ] } },
86 { "type": "Feature", "properties": { "building_id": "BLD00081" }, "geometry": { "type": "Point", "coordinates": [ 261634.114017375075491, 6243082.292137118987739 ] } },
87 { "type": "Feature", "properties": { "building_id": "BLD00082" }, "geometry": { "type": "Point", "coordinates": [ 261578.595691138558323, 6243479.813828552141786 ] } },
88 { "type": "Feature", "properties": { "building_id": "BLD00083" }, "geometry": { "type": "Point", "coordinates": [ 261517.096565730316797, 6243250.91321156360209 ] } },
89 { "type": "Feature", "properties": { "building_id": "BLD00084" }, "geometry": { "type": "Point", "coordinates": [ 261853.408177526143845, 6243226.144067470915616 ] } },
90 { "type": "Feature", "properties": { "building_id": "BLD00085" }, "geometry": { "type": "Point", "coordinates": [ 261855.369551056064665, 6243219.713457782752812 ] } },
91 { "type": "Feature", "properties": { "building_id": "BLD00086" }, "geometry": { "type": "Point", "coordinates": [ 261861.679432288365206, 6243208.841380749829113 ] } },
92 { "type": "Feature", "properties": { "building_id": "BLD00087" }, "geometry": { "type": "Point", "coordinates": [ 261530.515195407584542, 6243281.736756723374128 ] } },
93 { "type": "Feature", "properties": { "building_id": "BLD00088" }, "geometry": { "type": "Point", "coordinates": [ 261522.699896181176882, 6243466.426898236386478 ] } },
94 { "type": "Feature", "properties": { "building_id": "BLD00089" }, "geometry": { "type": "Point", "coordinates": [ 261524.10461771505652, 6243341.942325769923627 ] } },
95 { "type": "Feature", "properties": { "building_id": "BLD00090" }, "geometry": { "type": "Point", "coordinates": [ 261623.631327905983198, 6243227.057141144759953 ] } },
96 { "type": "Feature", "properties": { "building_id": "BLD00091" }, "geometry": { "type": "Point", "coordinates": [ 261557.147803285566624, 6243264.75945173855871 ] } },
97 { "type": "Feature", "properties": { "building_id": "BLD00092" }, "geometry": { "type": "Point", "coordinates": [ 261594.405038303986657, 6243359.405571288429201 ] } },
98 { "type": "Feature", "properties": { "building_id": "BLD00093" }, "geometry": { "type": "Point", "coordinates": [ 261870.693769811012316, 6243245.471781048923731 ] } },
99 { "type": "Feature", "properties": { "building_id": "BLD00094" }, "geometry": { "type": "Point", "coordinates": [ 261883.260421003767988, 6243225.237970895133913 ] } },
100 { "type": "Feature", "properties": { "building_id": "BLD00095" }, "geometry": { "type": "Point", "coordinates": [ 261573.696752223768272, 6243292.37845625076443 ] } },
101 { "type": "Feature", "properties": { "building_id": "BLD00096" }, "geometry": { "type": "Point", "coordinates": [ 261733.489896827493794, 6243206.462480372749269 ] } },
102 { "type": "Feature", "properties": { "building_id": "BLD00097" }, "geometry": { "type": "Point", "coordinates": [ 261811.64618538270588, 6243236.091016246005893 ] } },
103 { "type": "Feature", "properties": { "building_id": "BLD00098" }, "geometry": { "type": "Point", "coordinates": [ 261587.927591018087696, 6243189.933091033250093 ] } },
104 { "type": "Feature", "properties": { "building_id": "BLD00099" }, "geometry": { "type": "Point", "coordinates": [ 261867.425021292903693, 6243238.69190439581871 ] } },
105 { "type": "Feature", "properties": { "building_id": "BLD00100" }, "geometry": { "type": "Point", "coordinates": [ 261792.740836067998316, 6243310.714075128547847 ] } },
106 { "type": "Feature", "properties": { "building_id": "BLD00101" }, "geometry": { "type": "Point", "coordinates": [ 261903.296934477315517, 6243298.555533128790557 ] } },
107 { "type": "Feature", "properties": { "building_id": "BLD00102" }, "geometry": { "type": "Point", "coordinates": [ 261892.77502915187506, 6243274.315914674662054 ] } },
108 { "type": "Feature", "properties": { "building_id": "BLD00103" }, "geometry": { "type": "Point", "coordinates": [ 261547.858400432334747, 6243308.859864143654704 ] } },
109 { "type": "Feature", "properties": { "building_id": "BLD00104" }, "geometry": { "type": "Point", "coordinates": [ 261887.659337148099439, 6243298.314735687337816 ] } },
110 { "type": "Feature", "properties": { "building_id": "BLD00105" }, "geometry": { "type": "Point", "coordinates": [ 261562.137966077629244, 6243420.302202493883669 ] } },
111 { "type": "Feature", "properties": { "building_id": "BLD00106" }, "geometry": { "type": "Point", "coordinates": [ 261662.860716139897704, 6243076.00944422185421 ] } },
112 { "type": "Feature", "properties": { "building_id": "BLD00107" }, "geometry": { "type": "Point", "coordinates": [ 261604.968645170389209, 6243089.46845246385783 ] } },
113 { "type": "Feature", "properties": { "building_id": "BLD00108" }, "geometry": { "type": "Point", "coordinates": [ 261872.537485425971681, 6243222.938187569379807 ] } },
114 { "type": "Feature", "properties": { "building_id": "BLD00109" }, "geometry": { "type": "Point", "coordinates": [ 261884.307185670244507, 6243260.039474564604461 ] } },
115 { "type": "Feature", "properties": { "building_id": "BLD00110" }, "geometry": { "type": "Point", "coordinates": [ 261869.67954509955598, 6243288.743581115268171 ] } },
116 { "type": "Feature", "properties": { "building_id": "BLD00111" }, "geometry": { "type": "Point", "coordinates": [ 261513.614615519705694, 6243329.466160691343248 ] } },
117 { "type": "Feature", "properties": { "building_id": "BLD00112" }, "geometry": { "type": "Point", "coordinates": [ 261821.379875708313193, 6243227.37662641517818 ] } },
118 { "type": "Feature", "properties": { "building_id": "BLD00113" }, "geometry": { "type": "Point", "coordinates": [ 261501.49676299400744, 6243402.020441994071007 ] } },
119 { "type": "Feature", "properties": { "building_id": "BLD00114" }, "geometry": { "type": "Point", "coordinates": [ 261549.43113717995584, 6243495.893704815767705 ] } },
120 { "type": "Feature", "properties": { "building_id": "BLD00115" }, "geometry": { "type": "Point", "coordinates": [ 261603.265974445268512, 6243440.836112289689481 ] } },
121 { "type": "Feature", "properties": { "building_id": "BLD00116" }, "geometry": { "type": "Point", "coordinates": [ 261614.195370651897974, 6243335.824879642575979 ] } },
122 { "type": "Feature", "properties": { "building_id": "BLD00117" }, "geometry": { "type": "Point", "coordinates": [ 261876.493096675694687, 6243249.34702573530376 ] } },
123 { "type": "Feature", "properties": { "building_id": "BLD00118" }, "geometry": { "type": "Point", "coordinates": [ 261591.575652366416762, 6243459.391201011836529 ] } },
124 { "type": "Feature", "properties": { "building_id": "BLD00119" }, "geometry": { "type": "Point", "coordinates": [ 261597.113663658470614, 6243308.398411450907588 ] } },
125 { "type": "Feature", "properties": { "building_id": "BLD00120" }, "geometry": { "type": "Point", "coordinates": [ 261577.557915473240428, 6243337.243704699911177 ] } },
126 { "type": "Feature", "properties": { "building_id": "BLD00121" }, "geometry": { "type": "Point", "coordinates": [ 261520.873391919012647, 6243429.298777872696519 ] } },
127 { "type": "Feature", "properties": { "building_id": "BLD00122" }, "geometry": { "type": "Point", "coordinates": [ 261865.472118541889358, 6243230.795933586545289 ] } }
128 ]
129 }
0:39
The output GeoJSON has 122 features (matching the 122 input rows), all with Point geometry and a `building_id` column. No null or empty building_ids are present. The file is written correctly. Let me do a quick validation.
0:39
0:39
Bash
cd /work && python3 -c "
cd /work && python3 -c "
import geopandas as gpd
gdf = gpd.read_file('building_centroids.geojson')
print('Shape:', gdf.shape)
print('Columns:', gdf.columns.tolist())
print('Geometry types:', gdf.geometry.type.unique())
print('Null building_id:', gdf['building_id'].isna().sum())
print('Empty building_id:', (gdf['building_id'] == '').sum())
print('First 3 rows:')
print(gdf.head(3))
"
Shape: (122, 2) Columns: ['building_id', 'geometry'] Geometry types: <ArrowStringArray> ['Point'] Length: 1, dtype: str Null building_id: 0 Empty building_id: 0 First 3 rows: building_id geometry 0 BLD00001 POINT (262131.639 6243436.712) 1 BLD00002 POINT (261950.751 6243258.841) 2 BLD00003 POINT (261763.586 6243178.854)
0:44
The output is exactly as required: 1. GeoJSON FeatureCollection with Point geometry only ✓ 2. Has a `building_id` column with the building identifier from the input ✓ 3. No null or empty `building_id` values ✓ 4. 122 features (one per footprint) ✓ The result is written to `/work/building_centroids.geojson`.
0:44